How to Store Bitcoin on USB Stick or Wallet? - Cryptalker

bitkey.io - "A self-contained Live CD/USB key with everything you need to perform highly secure air-gapped Bitcoin transactions. Offline cold storage made (slightly more) practical.". It's a project related to the Turnkey (Linux based virtual machines that can be run on Virtualbox et al.) project.

bitkey.io - submitted by todu to Bitcoin [link] [comments]

Why can't you just store the wallet offline on an usb stick? Not cold storage/hard ware. Just a regular usb stick? /r/Bitcoin

Why can't you just store the wallet offline on an usb stick? Not cold storage/hard ware. Just a regular usb stick? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

[uncensored-r/Bitcoin] Why can't you just store the wallet offline on an usb stick? Not cold storage/hard ware. Just a r...

The following post by f39ewjdwje932 is being replicated because the post has been silently removed.
The original post can be found(in censored form) at this link:
np.reddit.com/ Bitcoin/comments/7inmlt
The original post's content was as follows:
Wouldn't it keep it safe from hackers? I tried googling it, but never found anyone discussing this. Only Ledger and such.
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

Best bitcoin wallet for offline USB storage (PC/Windows)?

submitted by HurricaneTerminator to Bitcoin [link] [comments]

Need to keep your information safe? Secure usb key for bitcoin offline storage!

Brought to you by the same assholes that are bringing you
https://cryoniks.com/
That's right the vapor hardware 1000TH MINING MACHINE!!!!!
You want credibility ... well these fine folks http://www.saffordbaker.com/ https://www.facebook.com/crypteks http://www.cryptrade.com/ http://www.linkedin.com/pub/dennis-flynn/11/543/16b?trk=pub-pbmap http://www.bizapedia.com/mi/CRYONIKS-INC.html
APPARENTLY NEVER DELIVERED!!! http://www.kickstarter.com/projects/crypteks/crypteks-usbtm-encrypted-and-lockable-usb-solution/comments?cursor=1422484 http://www.linkedin.com/in/randysafford?trk=pub-pbmap
submitted by lizard450 to Bitcoin [link] [comments]

PDQ Deploy packs v71.0.0 (2020-06-12)

Background

This is v71.0.0 (v70.0.0, v69.0.0, etc...) of our PDQ installers and includes all installers from the previous package with old versions removed.
All packages:
  1. ...install silently and don't place desktop or quicklaunch shortcuts
  2. ...disable all auto-update, nag popup and stat-collection/telemetry "features" possible
  3. ...work with the free or paid version of PDQ Deploy but do not require it - each package can run standalone (e.g. from a thumb drive) or pushed with SCCM/GPO/etc if desired. PM me if you need assistance setting something like that up

Download

Primary:
Download the torrent.
Secondary: Download the self-extracting archive from one of the repos:
Mirror HTTPS HTTP Location Host
Official link link US-NY SGC-Hosting
#1 link link FR mxmod
Tertiary:
Plug one of these keys into Resilio Sync (formerly called "BT Sync") to pull down that repository:
- BTRSRPF7Y3VWFRBG64VUDGP7WIIVNTR4Q (Installer Packages, ~2.25 GB) - BMHHALGV7WLNSAPIPYDP5DU3NDNSM5XNC (WSUS Offline updates, ~12.00 GB) 
Make sure the settings for your Sync folder look like this (or this if you're on v1.3.x). Specifically you need to enable DHT.
Quaternary: (source code)
The Github page contains all scripts and wrapper files used in the pack. Check it out if you want to see the code without downloading the full binary pack, or just steal them for your own use. Note that downloading from Github directly won't work - you need either this provided pack or go manually fetch all the binaries yourself in order to just plug them in and start working.

Pack list

Installers:
(Updates in bold. All installers are 64-bit unless otherwise marked)
  • 7-Zip v19.00
  • 7-Zip v19.00 (x86)
  • Adobe Acrobat Reader DC v20.009.20063
  • Adobe AIR v32.0.0.125
  • Adobe Flash Player v32.0.0.387 (Chrome)
  • Adobe Flash Player v32.0.0.387 (Firefox)
  • Adobe Flash Player v32.0.0.387 (IE / ActiveX)
  • Apple iTunes v12.5.1.21
  • CDBurnerXP v4.5.8.7128
  • FileZilla Client v3.48.1
  • Gimp v2.10.20 (x86)
  • Google Chrome Enterprise v83.0.4103.97
  • Google Chrome Enterprise v83.0.4103.97 (x86)
  • Google Earth Pro v7.3.3
  • Java Development Kit 8 Update 241
  • Java Development Kit 8 Update 241 (x86)
  • Java Development Kit 11.0.7
  • Java Runtime 8 update 241
  • Java Runtime 8 update 241 (x86)
  • Java Runtime 10.0.2
  • KTS KypM Telnet/SSH Server v1.19c (x86)
  • LibreOffice v6.4.4
  • Microsoft .NET Framework v3.5.1 SP1 (x86)
  • Microsoft Silverlight v5.1.50918.0
  • Mozilla Firefox v77.0.1
  • Mozilla Firefox v77.0.1 (x86)
  • Mozilla Firefox ESR v68.9.0
  • Mozilla Firefox ESR v68.9.0 (x86)
  • Mozilla Thunderbird v68.9.0 (x86) (customized; read notes)
  • Notepad++ v7.8.7 (x86)
  • Pale Moon v28.10.0
  • Pale Moon v28.10.0 (x86)
  • Spark v2.8.3 (x86)
  • TightVNC v2.8.27
  • TightVNC v2.8.27 (x86)
  • UltraVNC v1.2.4.0 (x86)
  • VLC media player v3.0.10 -- ! NOTE: Switched to x64 only (dropped x86 package)
  • WinSCP v5.17.6 (x86)
Utilities:
  • Clean Up ALL Printers (purge all printers from target)
  • Clean Up Orphaned Printers (remove non-existent printers from the spooler)
  • Empty All Recycle Bins (empty recycle bin to empty for every user on target)
  • Enable Remote Desktop
  • Install PKI Certificates
  • Reboot (force target reboot in 15 seconds)
  • Remove Adobe Flash Player (removes all versions)
  • Remove Java Runtime (removes JRE versions 3-11 using all means necessary)
  • Remove Microsoft Silverlight (removes all versions of Silverlight)
  • Temp File Cleanup
  • USB Device Cleanup. Uninstalls non-present USB hubs, USB storage devices and their storage volumes, Disks, CD-ROM's, Floppies, WPD devices and deletes their registry items. Devices will re-initialize at next connection

Instructions

  1. Import all .XML files from the \job files directory into PDQ deploy (it should look roughly like this after you've imported them).
  2. Copy all files from the \repository directory to wherever your repository is.
  3. All jobs reference PDQ's $(Repository) variable, so make sure it's set in preferences.

Package Notes

  1. Read the notes in the PDQ interface for each package, they explain exactly what that installer does. Basically, most packages use a .bat file to accomplish multi-step installs with the free version of PDQ. You can edit the batch files to see what they do; most just delete "All Users" desktop shortcuts and things like that. changelog-v##-updated-.txt has version and release history in addition to random notes where I complain about things like Reader DC and how much of a pain it is to build packages for.
  2. Thunderbird:
    • Thunderbird is configured to use a global config file stored on a network share. This allows for settings changes en masse. By default it's set to check for config updates every 120 minutes.
    • You can change the config location, update frequency, OR disable this behavior entirely by editing thunderbird-custom-settings.js.
    • A copy of the config file is in the Thunderbird directory and is called thunderbird-global-settings.js
    • If you don't want any customizations, just edit Thunderbird's .bat file and comment out or delete all the lines mentioning the custom config files.
  3. Microsoft Offline Updates - built using the excellent WSUS Offline tool. Please donate to them if you can, their team does excellent work.

Integrity

In the folder \integrity verification the file checksums.txt is signed with my PGP key (0x07d1490f82a211a2, pubkey included). You can use this to verify package integrity.
If you find a bug or glitch, PM me or post it here. Advice and comments are welcome and appreciated.

Donations

These packs will always be free and open-source. If you feel like giving away your hard-earned cash to random strangers on the internet you may do so here:
Patreon
Bitcoin: 1Bfxpo1WqTGwRXZKrwYZV2zvJ4ggyj9GE1
Monero (preferred):
46ZUK4VDLLz3zapDw62UaS71ZfFBjH9uwhc8FeyocPhUHHsuxj5zfvpZpZcZFHWpxoXD99MVt6PnR9QfftXDV8s6CFAnPSo
"Do not withhold good from those to whom it is due, when it is in your power to act."
submitted by vocatus to sysadmin [link] [comments]

Choosing The Best Multi-Currency Wallet For Crypto in 2020

Crypto differs from fiat in terms of storage. It is saved not in some kind of virtual bank, but directly in the blockchain. The coins, information on the distribution of digital assets between users, transaction history – all this data is stored by the chain. Such data cannot be changed or erased in any way. And without a crypto wallet, you cannot manage your assets.

Let’s have a look at different types of crypto wallets.

A cryptocurrency wallet stores your “private” and “public” keys used to send and receive various crypto tokens. The interface and design of the programs help users to get all the necessary information about their digital savings.
There are two types of wallets:

How do cryptocurrency wallets work?

Cryptocurrency wallets are not designed to actually store digital assets; instead, they provide the tools necessary to interact with the blockchain network. The wallet includes a public address, which is an identifier in the form of a set of letters and numbers. This address is a kind of location on the blockchain where you can send coins. You can share your public address with another user to receive funds, but you should never show your private key to anyone.
A private key provides access to your cryptocurrencies, regardless of which wallet you use. Thus, even if your computer or smartphone was compromised, you can still access your funds from any other device, provided that you have the appropriate private key (or seed phrase).

Types of wallets

Web wallet

This type of wallet is suitable for beginners, since it does not require the purchase of devices, software installation, or downloading the blockchain. It is enough for the user to register on the site. Web wallets are simple and convenient to use, they do not take up space on the HDD and are constantly synchronized with the blockchain network, even when your computer is offline.
Cryptopay enables customers to transfer money directly between their Cryptopay wallet and SEPA (Single Euro Payments Area) bank account, store their funds safely in a multi-coin portfolio, protected by two-factor authentication to increase security.
Coinbase is a trading service that many retailers use to receive digital currencies from sales. Private keys are stored on the server, and client funds are stored on a cold wallet. You can enable two-factor authentication and install the smartphone app.

Desktop wallet

The local wallet is installed on the hard drive and loaded with the operating system. Such wallets are divided into “thick” (full-node clients) and “thin” (light-node clients). Thick ones can take up to hundreds of gigabytes of hard drive space. Thin local wallet is actually a program that makes requests to the blockchain through a trusted site.
Bitcoin Core is a Bitcoin wallet created by the Bitcoin Foundation. If you want to get a truly secure place for your digital assets, choose this thick desktop wallet.
Exodus is a universal thin crypto wallet. It supports 100+ altcoins and has a built-in exchange service. Also, Exodus can interact with the Trezor Crypto Hardware Wallet.

Mobile phone and browser wallets

Mobile wallets are available through special applications. You can use them for shopping in real stores where crypto is accepted – just like ApplePay.
Benefits of Mobile Wallets:
Disadvantages of mobile wallets:
Coinomi is a multi-currency application with two integrated exchange services (Shapeshift and Changelly). The wallet supports 100+ virtual coins, the keys are stored exclusively in the application.
Browser wallet is an extension for Chrome and Opera browsers. It is very easy to use: you just enter seed phrases and get access to the savings.
The Jaxx extension for Chrome from the team of developers of the browser wallet KryptoKit, supports not only Bitcoin, but Ethereum as well.

Hardware wallet

This is the most reliable option for saving virtual assets. They look like ordinary USB flash drives. The user inserts a USB, logs on a wallet program by entering a password and thus gets access to the funds. All operations are performed not in the system, but directly on the flash drive itself, which eliminates extraneous access to data.
Trezor wallet supports most of the top coins, it can be synchronized with the MyEtherWallet online wallet, as well as Chrome and Firefox browsers to get access to crypto funds.
Ledger Nano S is miniature, safe, and easy to use and has several levels of protection. Asset management is performed through the Ledger Manager utility.

Paper wallet

A paper wallet is a piece of paper that usually has QR codes that can be quickly scanned to get the address to a crypto account. The main advantage of services like BitAddress and Bitcoin Paper Wallet is that the keys are actually stored offline, which makes them immune to hacker attacks. The main drawback, however, is that the paper wallet can be stolen or lost.

Which wallet is the safest?

An offline crypto wallet is the most reliable one. You can install a local wallet on a PC that is not connected to the Internet and store your digital assets on it, but this is not very convenient if you need to quickly complete a transaction.

Conclusion

The choice depends on how you plan to use your tokens. Small amounts of crypto can be stored on thin local or Internet wallets, and for long-term storage of large amounts, it is better to get thick or hardware wallets. In any case, remember to strictly observe all security measures.
submitted by CoinjoyAssistant to u/CoinjoyAssistant [link] [comments]

PDQ Deploy packs v71.0.0 (2020-06-12)

Background

This is v71.0.0 (v70.0.0, v69.0.0, etc...) of our PDQ installers and includes all installers from the previous package with old versions removed.
All packages:
  1. ...install silently and don't place desktop or quicklaunch shortcuts
  2. ...disable all auto-update, nag popup and stat-collection/telemetry "features" possible
  3. ...work with the free or paid version of PDQ Deploy but do not require it - each package can run standalone (e.g. from a thumb drive) or pushed with SCCM/GPO/etc if desired. PM me if you need assistance setting something like that up

Download

Primary:
Download the torrent.
Secondary: Download the self-extracting archive from one of the repos:
Mirror HTTPS HTTP Location Host
Official link link US-NY SGC-Hosting
#1 link link FR mxmod
Tertiary:
Plug one of these keys into Resilio Sync (formerly called "BT Sync") to pull down that repository:
- BTRSRPF7Y3VWFRBG64VUDGP7WIIVNTR4Q (Installer Packages, ~2.25 GB) - BMHHALGV7WLNSAPIPYDP5DU3NDNSM5XNC (WSUS Offline updates, ~12.00 GB) 
Make sure the settings for your Sync folder look like this (or this if you're on v1.3.x). Specifically you need to enable DHT.
Quaternary: (source code)
The Github page contains all scripts and wrapper files used in the pack. Check it out if you want to see the code without downloading the full binary pack, or just steal them for your own use. Note that downloading from Github directly won't work - you need either this provided pack or go manually fetch all the binaries yourself in order to just plug them in and start working.

Pack list

Installers:
(Updates in bold. All installers are 64-bit unless otherwise marked)
  • 7-Zip v19.00
  • 7-Zip v19.00 (x86)
  • Adobe Acrobat Reader DC v20.009.20063
  • Adobe AIR v32.0.0.125
  • Adobe Flash Player v32.0.0.387 (Chrome)
  • Adobe Flash Player v32.0.0.387 (Firefox)
  • Adobe Flash Player v32.0.0.387 (IE / ActiveX)
  • Apple iTunes v12.5.1.21
  • CDBurnerXP v4.5.8.7128
  • FileZilla Client v3.48.1
  • Gimp v2.10.20 (x86)
  • Google Chrome Enterprise v83.0.4103.97
  • Google Chrome Enterprise v83.0.4103.97 (x86)
  • Google Earth Pro v7.3.3
  • Java Development Kit 8 Update 241
  • Java Development Kit 8 Update 241 (x86)
  • Java Development Kit 11.0.7
  • Java Runtime 8 update 241
  • Java Runtime 8 update 241 (x86)
  • Java Runtime 10.0.2
  • KTS KypM Telnet/SSH Server v1.19c (x86)
  • LibreOffice v6.4.4
  • Microsoft .NET Framework v3.5.1 SP1 (x86)
  • Microsoft Silverlight v5.1.50918.0
  • Mozilla Firefox v77.0.1
  • Mozilla Firefox v77.0.1 (x86)
  • Mozilla Firefox ESR v68.9.0
  • Mozilla Firefox ESR v68.9.0 (x86)
  • Mozilla Thunderbird v68.9.0 (x86) (customized; read notes)
  • Notepad++ v7.8.7 (x86)
  • Pale Moon v28.10.0
  • Pale Moon v28.10.0 (x86)
  • Spark v2.8.3 (x86)
  • TightVNC v2.8.27
  • TightVNC v2.8.27 (x86)
  • UltraVNC v1.2.4.0 (x86)
  • VLC media player v3.0.10 -- ! NOTE: Switched to x64 only (dropped x86 package)
  • WinSCP v5.17.6 (x86)
Utilities:
  • Clean Up ALL Printers (purge all printers from target)
  • Clean Up Orphaned Printers (remove non-existent printers from the spooler)
  • Empty All Recycle Bins (force all recycle bins to empty on target)
  • Enable Remote Desktop
  • Install PKI Certificates
  • Reboot (force target reboot in 15 seconds)
  • Remove Adobe Flash Player (removes all versions)
  • Remove Java Runtime (removes JRE versions 3-11 using all means necessary)
  • Remove Microsoft Silverlight (removes all versions of Silverlight)
  • Temp File Cleanup
  • USB Device Cleanup. Uninstalls non-present USB hubs, USB storage devices and their storage volumes, Disks, CD-ROM's, Floppies, WPD devices and deletes their registry items. Devices will re-initialize at next connection

Instructions

  1. Import all .XML files from the \job files directory into PDQ deploy (it should look roughly like this after you've imported them).
  2. Copy all files from the \repository directory to wherever your repository is.
  3. All jobs reference PDQ's $(Repository) variable, so make sure it's set in preferences.

Package Notes

  1. Read the notes in the PDQ interface for each package, they explain exactly what that installer does. Basically, most packages use a .bat file to accomplish multi-step installs with the free version of PDQ. You can edit the batch files to see what they do; most just delete "All Users" desktop shortcuts and things like that. changelog-v##-updated-.txt has version and release history in addition to random notes where I complain about things like Reader DC and how much of a pain it is to build packages for.
  2. Thunderbird:
    • Thunderbird is configured to use a global config file stored on a network share. This allows for settings changes en masse. By default it's set to check for config updates every 120 minutes.
    • You can change the config location, update frequency, OR disable this behavior entirely by editing thunderbird-custom-settings.js.
    • A copy of the config file is in the Thunderbird directory and is called thunderbird-global-settings.js
    • If you don't want any customizations, just edit Thunderbird's .bat file and comment out or delete all the lines mentioning the custom config files.
  3. Microsoft Offline Updates - built using the excellent WSUS Offline tool. Please donate to them if you can, their team does excellent work.

Integrity

In the folder \integrity verification the file checksums.txt is signed with my PGP key (0x07d1490f82a211a2, pubkey included). You can use this to verify package integrity.
If you find a bug or glitch, PM me or post it here. Advice and comments are welcome and appreciated.

Donations

These packs will always be free and open-source. If you feel like giving away your hard-earned cash to random strangers on the internet you may do so here:
Patreon
Bitcoin: 1Bfxpo1WqTGwRXZKrwYZV2zvJ4ggyj9GE1
Monero (preferred):
46ZUK4VDLLz3zapDw62UaS71ZfFBjH9uwhc8FeyocPhUHHsuxj5zfvpZpZcZFHWpxoXD99MVt6PnR9QfftXDV8s6CFAnPSo
"Do not withhold good from those to whom it is due, when it is in your power to act."
submitted by vocatus to pdq [link] [comments]

PDQ Deploy packs v70.0.0 (2020-03-31)

Background

This is v70.0.0 (v69.0.0, v68.0.0, v67.0.0, etc...) of our PDQ installers and includes all installers from the previous package with old versions removed.
All packages:
  1. ...install silently and don't place desktop or quicklaunch shortcuts
  2. ...disable all auto-update, nag popup and stat-collection/telemetry "features" possible
  3. ...work with the free or paid version of PDQ Deploy but do not require it - each package can run standalone (e.g. from a thumb drive) or pushed with SCCM/GPO/etc if desired. PM me if you need assistance setting something like that up

Download

Primary:
Download the torrent.
Secondary: Download the self-extracting archive from one of the repos:
Mirror HTTPS HTTP Location Host
Official link link US-NY SGC-Hosting
#1 link link FR mxmod
Tertiary:
Plug one of these keys into Resilio Sync (formerly called "BT Sync") to pull down that repository:
- BTRSRPF7Y3VWFRBG64VUDGP7WIIVNTR4Q (Installer Packages, ~2.15 GB) - BMHHALGV7WLNSAPIPYDP5DU3NDNSM5XNC (WSUS Offline updates, ~12.00 GB) 
Make sure the settings for your Sync folder look like this (or this if you're on v1.3.x). Specifically you need to enable DHT.
Quaternary: (source code)
The Github page contains all scripts and wrapper files used in the pack. Check it out if you want to see the code without downloading the full binary pack, or just steal them for your own use. Note that downloading from Github directly won't work - you need either this provided pack or go manually fetch all the binaries yourself in order to just plug them in and start working.

Pack list

Installers:
(Updates in bold. All installers are 64-bit unless otherwise marked)
  • 7-Zip v19.00
  • 7-Zip v19.00 (x86)
  • Adobe Acrobat Reader DC v20.006.20042
  • Adobe AIR v32.0.0.125
  • Adobe Flash Player v32.0.0.344 (Chrome)
  • Adobe Flash Player v32.0.0.344 (Firefox)
  • Adobe Flash Player v32.0.0.344 (IE / ActiveX)
  • Apple iTunes v12.5.1.21
  • CDBurnerXP v4.5.8.7128
  • FileZilla Client v3.47.2.1
  • Gimp v2.10.18 (x86)
  • Google Chrome Enterprise v80.0.3987.149
  • Google Chrome Enterprise v80.0.3987.149 (x86)
  • Google Earth Pro v7.3.2
  • Java Development Kit 8 Update 241
  • Java Development Kit 8 Update 241 (x86)
  • Java Development Kit 11.0.6
  • Java Runtime 8 update 241
  • Java Runtime 8 update 241 (x86)
  • Java Runtime 10.0.2
  • KTS KypM Telnet/SSH Server v1.19c (x86)
  • LibreOffice v6.4.2
  • Microsoft .NET Framework v3.5.1 SP1 (x86)
  • Microsoft Silverlight v5.1.50918.0
  • Mozilla Firefox v74.0.0
  • Mozilla Firefox v74.0.0 (x86)
  • Mozilla Firefox ESR v68.6.0
  • Mozilla Firefox ESR v68.6.0 (x86)
  • Mozilla Thunderbird v68.6.0 (x86) (customized; read notes)
  • Notepad++ v7.8.5 (x86)
  • Pale Moon v28.9.0.2
  • Pale Moon v28.9.0.2 (x86)
  • Spark v2.8.3 (x86)
  • TightVNC v2.8.27
  • TightVNC v2.8.27 (x86)
  • UltraVNC v1.2.4.0 (x86)
  • VLC media player v3.0.8 (x86)
  • WinSCP v5.17.2 (x86)
Utilities:
  • Clean Up ALL Printers (purge all printers from target)
  • Clean Up Orphaned Printers (remove non-existent printers from the spooler)
  • Empty All Recycle Bins (force all recycle bins to empty on target)
  • Enable Remote Desktop
  • Install PKI Certificates
  • Reboot (force target reboot in 15 seconds)
  • Remove Adobe Flash Player (removes all versions)
  • Remove Java Runtime (removes JRE versions 3-11 using all means necessary)
  • Remove Microsoft Silverlight (removes all versions of Silverlight)
  • Temp File Cleanup
  • USB Device Cleanup. Uninstalls non-present USB hubs, USB storage devices and their storage volumes, Disks, CD-ROM's, Floppies, WPD devices and deletes their registry items. Devices will re-initialize at next connection

Instructions

  1. Import all .XML files from the \job files directory into PDQ deploy (it should look roughly like this after you've imported them).
  2. Copy all files from the \repository directory to wherever your repository is.
  3. All jobs reference PDQ's $(Repository) variable, so make sure it's set in preferences.

Package Notes

  1. Read the notes in the PDQ interface for each package, they explain exactly what that installer does. Basically, most packages use a .bat file to accomplish multi-step installs with the free version of PDQ. You can edit the batch files to see what they do; most just delete "All Users" desktop shortcuts and things like that. changelog-v##-updated-.txt has version and release history in addition to random notes where I complain about things like Reader DC and how much of a pain it is to build packages for.
  2. Thunderbird:
    • Thunderbird is configured to use a global config file stored on a network share. This allows for settings changes en masse. By default it's set to check for config updates every 120 minutes.
    • You can change the config location, update frequency, OR disable this behavior entirely by editing thunderbird-custom-settings.js.
    • A copy of the config file is in the Thunderbird directory and is called thunderbird-global-settings.js
    • If you don't want any customizations, just edit Thunderbird's .bat file and comment out or delete all the lines mentioning the custom config files.
  3. Microsoft Offline Updates - built using the excellent WSUS Offline tool. Please donate to them if you can, their team does excellent work.

Integrity

In the folder \integrity verification the file checksums.txt is signed with my PGP key (0x07d1490f82a211a2, pubkey included). You can use this to verify package integrity.
If you find a bug or glitch, PM me or post it here. Advice and comments are welcome and appreciated.

Donations

These packs will always be free and open-source, although donations are of course appreciated since all work done on them is in my spare time for free. If you feel like giving away your hard-earned cash to random strangers on the internet you may do so here:
Patreon
Bitcoin: 1Bfxpo1WqTGwRXZKrwYZV2zvJ4ggyj9GE1
Monero (preferred):
46ZUK4VDLLz3zapDw62UaS71ZfFBjH9uwhc8FeyocPhUHHsuxj5zfvpZpZcZFHWpxoXD99MVt6PnR9QfftXDV8s6CFAnPSo
"Do not withhold good from those to whom it is due, when it is in your power to act."
submitted by vocatus to pdq [link] [comments]

PDQ Deploy packs v69.0.0 (2020-02-06)

Background

This is v69.0.0 (v68.0.0, v67.0.0, v66.0.0, v65.0.0, etc...) of our PDQ installers and includes all installers from the previous package with old versions removed.
All packages:
  1. ...install silently and don't place desktop or quicklaunch shortcuts
  2. ...disable all auto-update, nag popup and stat-collection/telemetry "features" possible
  3. ...work with the free or paid version of PDQ Deploy but do not require it - each package can run standalone (e.g. from a thumb drive) or pushed with SCCM/GPO/etc if desired. PM me if you need assistance setting something like that up

Download

Primary:
Download the torrent.
Secondary: Download the self-extracting archive from one of the repos:
Mirror HTTPS HTTP Location Host
Official link link US-NY SGC-Hosting
#1 link link FR mxmod
Tertiary:
Plug one of these keys into Resilio Sync (formerly called "BT Sync") to pull down that repository:
- BTRSRPF7Y3VWFRBG64VUDGP7WIIVNTR4Q (Installer Packages, ~2.15 GB) - BMHHALGV7WLNSAPIPYDP5DU3NDNSM5XNC (WSUS Offline updates, ~12.00 GB) 
Make sure the settings for your Sync folder look like this (or this if you're on v1.3.x). Specifically you need to enable DHT.
Quaternary: (source code)
The Github page contains all scripts and wrapper files used in the pack. Check it out if you want to see the code without downloading the full binary pack, or just steal them for your own use. Note that downloading from Github directly won't work - you need either this provided pack or go manually fetch all the binaries yourself in order to just plug them in and start working.

Pack list

Installers:
(Updates in bold. All installers are 64-bit unless otherwise marked)
  • 7-Zip v19.00
  • 7-Zip v19.00 (x86)
  • Adobe Acrobat Reader DC v19.021.20058
  • Adobe AIR v32.0.0.125
  • Adobe Flash Player v32.0.0.321 (Chrome)
  • Adobe Flash Player v32.0.0.321 (Firefox)
  • Adobe Flash Player v32.0.0.321 (IE / ActiveX)
  • Apple iTunes v12.5.1.21
  • CDBurnerXP v4.5.8.7128
  • CutePDF v3.0 (PDF printer) (x86) // REMOVED; Since Windows natively supports PDF printing now there's no reason to keep this in the pack
  • FileZilla Client v3.46.3
  • Gimp v2.10.14 (x86)
  • Google Chrome Enterprise v80.0.3987.87
  • Google Chrome Enterprise v80.0.3987.87 (x86)
  • Google Earth Pro v7.3.2
  • Java Development Kit 8 Update 231
  • Java Development Kit 8 Update 231 (x86)
  • Java Development Kit 11.0.6
  • Java Runtime 8 update 231
  • Java Runtime 8 update 231 (x86)
  • Java Runtime 10.0.2
  • KTS KypM Telnet/SSH Server v1.19c (x86)
  • LibreOffice v6.4.0
  • Microsoft .NET Framework v3.5.1 SP1 (x86)
  • Microsoft Silverlight v5.1.50918.0
  • Mozilla Firefox v72.0.2
  • Mozilla Firefox v72.0.2 (x86)
  • Mozilla Firefox ESR v68.4.2
  • Mozilla Firefox ESR v68.4.2 (x86)
  • Mozilla Thunderbird v68.4.2 (x86) (customized; read notes)
  • Notepad++ v7.8.4 (x86)
  • Pale Moon v28.8.2.1
  • Pale Moon v28.8.2.1 (x86)
  • Spark v2.8.3 (x86)
  • TightVNC v2.8.27
  • TightVNC v2.8.27 (x86)
  • UltraVNC v1.2.2.4 (x86)
  • VLC media player v3.0.8 (x86)
  • WinSCP v5.15.9 (x86)
Utilities:
  • Clean Up ALL Printers (purge all printers from target)
  • Clean Up Orphaned Printers (remove non-existent printers from the spooler)
  • Empty All Recycle Bins (force all recycle bins to empty on target)
  • Enable Remote Desktop
  • Install PKI Certificates
  • Reboot (force target reboot in 15 seconds)
  • Remove Adobe Flash Player (removes all versions)
  • Remove Java Runtime (removes JRE versions 3-11 using all means necessary)
  • Remove Microsoft Silverlight (removes all versions of Silverlight)
  • Temp File Cleanup
  • USB Device Cleanup. Uninstalls non-present USB hubs, USB storage devices and their storage volumes, Disks, CD-ROM's, Floppies, WPD devices and deletes their registry items. Devices will re-initialize at next connection

Instructions

  1. Import all .XML files from the \job files directory into PDQ deploy (it should look roughly like this after you've imported them).
  2. Copy all files from the \repository directory to wherever your repository is.
  3. All jobs reference PDQ's $(Repository) variable, so make sure it's set in preferences.

Package Notes

  1. Read the notes in the PDQ interface for each package, they explain exactly what that installer does. Basically, most packages use a .bat file to accomplish multi-step installs with the free version of PDQ. You can edit the batch files to see what they do; most just delete "All Users" desktop shortcuts and things like that. changelog-v##-updated-.txt has version and release history in addition to random notes where I complain about things like Reader DC and how much of a pain it is to build packages for.
  2. Thunderbird:
    • Thunderbird is configured to use a global config file stored on a network share. This allows for settings changes en masse. By default it's set to check for config updates every 120 minutes.
    • You can change the config location, update frequency, OR disable this behavior entirely by editing thunderbird-custom-settings.js.
    • A copy of the config file is in the Thunderbird directory and is called thunderbird-global-settings.js
    • If you don't want any customizations, just edit Thunderbird's .bat file and comment out or delete all the lines mentioning the custom config files.
  3. Microsoft Offline Updates - built using the excellent WSUS Offline tool. Please donate to them if you can, their team does excellent work.

Integrity

In the folder \integrity verification the file checksums.txt is signed with my PGP key (0x07d1490f82a211a2, pubkey included). You can use this to verify package integrity.
If you find a bug or glitch, PM me or post it here. Advice and comments are welcome and appreciated.

Donations

These packs will always be free and open-source, although donations are of course appreciated since all work done on them is in my spare time for free. If you feel like giving away your hard-earned cash to random strangers on the internet you may do so here:
Patreon
Bitcoin: 1Bfxpo1WqTGwRXZKrwYZV2zvJ4ggyj9GE1
Monero (preferred):
46ZUK4VDLLz3zapDw62UaS71ZfFBjH9uwhc8FeyocPhUHHsuxj5zfvpZpZcZFHWpxoXD99MVt6PnR9QfftXDV8s6CFAnPSo
"Do not withhold good from those to whom it is due, when it is in your power to act."
submitted by vocatus to sysadmin [link] [comments]

What Is Bitcoin Private Key: Beginner’s Guide

What Is Bitcoin Private Key: Beginner’s Guide
Most of the people in this sub probably already know what the Bitcoin private key is and how it works, but there are many newcomers who do not fully understand all the technical aspects of it. I hope you guys will find it useful.

Bitcoin Private Keys: The Basics

Let’s start with some main principles.
  • A private key is functionally similar to a password to your email account. Unlike your email address, you never share it.
  • You need your private key to be able to receive the crypto someone sends you and to have access to your funds.
  • The BTC network does not store your private keys, they are generated and stored by the wallet software. There are different types of wallets.
IMPORTANT: The private key concept does not apply exclusively to Bitcoin. Other cryptocurrencies use it too.
Now, let’s see how a private key looks and works.

Bitcoin Private Key Definition

Bitcoin private key is an alphanumeric piece of code. It includes letters and numbers, just like your public address.
However, while a public address is like your plastic card number, a private key is like your CVC. You know, those secret three digits on the back of a card?
A private address is created in a random manner when you get a cryptocurrency wallet. The possibility of creating two identical private keys is almost zero, due to the sophisticated encryption algorithm, we apply for the purpose.
In the BTC network, a private key contains 256 symbols, as we obtain it using the SHA256 encryption algorithm. This function always returns 256 symbols, no matter the input.

Bitcoin private key in various formats, including WIF.

Wallet Import Format (WIF)

Using such a long string of code is inconvenient, so a private key is often presented in WIF (Wallet Import Format). It’s a shortened version that includes only 51 characters (numbers from 0 to 9 and letters in the range of A-F) and begins with 5.
Here is a Bitcoin private key example in WIF:
5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF
WIF has a few advantages over a full BTC private key version. As we have said, it’s shorter and more convenient to use. Also, it contains special pieces of code that serve to check the address for typos and correct them automatically.
WIF associates with only one private key and can be easily converted back into it, using an established algorithm.

Encrypting Private Keys

If a key looks like WIF but starts with 6, it is an encrypted version of a private key. People encrypt keys to ensure an extra layer of protection. To obtain such a string of code, we apply another algorithm. To decode (decrypt) the key we need to enter the password that we set when we were encrypting it.

How Bitcoin Private Key Works

You probably know Bitcoin as a digital payment system. To explain how it works, it would be better to compare it to a web-messenger, with massages transferring value. These ‘value messages’ are BTC transactions.
And what role a private key plays in sending these financial messages?
Let’s take a look at a real-life example.

https://preview.redd.it/fgtn8h63veu41.png?width=1261&format=png&auto=webp&s=9855f9aba70ebe7ca1f02b32c160ae78b2b42400

Using Private And Public Keys For a Transaction

Imagine you are sending 1 BTC to your friend Bill. You create a transaction and indicate yourself as the sender and Bill as the receiver of this amount. Then, you will broadcast the transaction to make the Bitcoin network aware of it.
  1. You start by choosing a private key. Using a special encryption algorithm, you derive a public key from it. You send this public key to Bill.
  2. You create a message for Bill and sign it with your digital signature. To obtain it, you pass your private key through a special encryption algorithm and attach the resulting code to the message. Every signature is unique, and you can use the same private address to produce an infinite number of them.
  3. Bill receives your message, public key, and signature and passes it through a signature algorithm. If it’s the message you sent, the algorithm returns ok.
Why we need a digital signature in the first place? There are three reasons. First, it tells the recipient that the message is from the sender he knows. Second, a digital signature makes it impossible for the sender to deny he sent the message. Third, it confirms that no one has altered the message in transit.
Unlike a traditional signature, a digital one cannot be forged. To produce it, you have to possess a secret private key.
https://preview.redd.it/k8n0vcg4veu41.png?width=624&format=png&auto=webp&s=9ab6c0bc25c0a638c4d3bfdbf86056f5462aa7d0

Why Keeping Your Private Key Secret Is Important

As we have mentioned, anyone in possession of your private key can steal your funds anytime.
If your wicked colleague Alice gets your private key (because you carelessly left your paper wallet on your desk), she can use it to create a digital signature. She can then use that signature to sign a transaction that will look like yours for the network. For instance, Alice can send all your crypto to another address. You will never be able to cancel this transaction and you are highly unlikely to know that she made it.
For this reason, you should be very careful with your private keys. Never send it to anyone using a messenger, or an email client, or a social media channel. Don’t share photographs of your private key. Never store a private key in a Google Doc file.
Please note that some desktop wallet apps store your private key in a standard directory on your hard drive. This place is a honeypot for hackers who know you are a cryptocurrency user. That’s why it’s extremely important to have up-to-date anti-virus software installed on your device.
https://preview.redd.it/bg2zd50aveu41.png?width=723&format=png&auto=webp&s=0e692f5c73c7c68ea854342b7fbeaf6aaa62f71f
Also, you may encrypt this wallet file to make it immune to malware. Many wallet apps provide this option. You will have to set a password to decrypt the private key, and the hacker will have to break this password to do it. If the password is strong, it will be a really difficult and time-consuming task.

Where To Store Private Keys: Mobile, Desktop And Hardware Wallets

As we have mentioned, the Bitcoin network does not store these keys. Instead, wallet services do it.

Mobile Wallets

Some of them allow you to keep and protect your private key, others do it automatically, applying various safety measures like 2FA or encryption. Note that nobody is responsible for it, your bitcoins will be gone if the service is hacked.

Desktop Wallets

Desktop wallets may be a good option. They provide a BTC public and private keys in the format of a file that you can download and import. You can protect this file with a strong password and safely store it on a hard drive. Don’t forget about safe storage for this drive, too. For instance, use a bank vault for this purpose.

Cold (Hardware) Wallets

Hardware wallets are the safest ones. They are small USB devices designed to store your funds and private keys offline, away from anyone who could steal them. For this very reason, hardware (or cold) wallets are impossible to hack. If you accidentally lose, damage or destroy such a device, you can recover your BTC and private keys using a backup phrase. The best-selling models of hardware wallets are Tresor and Ledger Nano S, supporting several popular coins.

https://preview.redd.it/7wlozgvcveu41.png?width=803&format=png&auto=webp&s=9c438a47a47f6bb2ba5dbd4fdfba924e8c960f47

Paper Wallets

These wallets are sheets of paper with BTC private keys and public address printed on them. Paper wallets look pretty basic and not very innovational, but it’s a safe way to store your BTC-related sensitive data. The main reason is that they are not connected to the Internet and thus are unreachable for malware attacks. This format is also immune to many mishaps that can affect electronic devices. To create a paper wallet you use a special web service like WalletGenerator.

P.S. Check out our blog if you are interested in more articles on crypto and finance
submitted by EX-SCUDO to btc [link] [comments]

PDQ Deploy packs v68.0.0 (2020-01-11)

Background

This is v68.0.0 (v67.0.0, v66.0.0, v65.0.0, v64.0.0, v63.0.0, etc...) of our PDQ installers and includes all installers from the previous package with old versions removed.
All packages:
  1. ...install silently and don't place desktop or quicklaunch shortcuts
  2. ...disable all auto-update, nag popup and stat-collection/telemetry "features" possible
  3. ...work with the free or paid version of PDQ Deploy but do not require it - each package can run standalone (e.g. from a thumb drive) or pushed with SCCM/GPO/etc if desired. PM me if you need assistance setting something like that up

Download

Primary:
Download the torrent.
Secondary: Download the self-extracting archive from one of the repos:
Mirror HTTPS HTTP Location Host
Official link link US-NY SGC-Hosting
#1 link link FR mxmod
Tertiary:
Plug one of these keys into Resilio Sync (formerly called "BT Sync") to pull down that repository:
- BTRSRPF7Y3VWFRBG64VUDGP7WIIVNTR4Q (Installer Packages, ~2.15 GB) - BMHHALGV7WLNSAPIPYDP5DU3NDNSM5XNC (WSUS Offline updates, ~12.00 GB) 
Make sure the settings for your Sync folder look like this (or this if you're on v1.3.x). Specifically you need to enable DHT.
Quaternary: (source code)
The Github page contains all scripts and wrapper files used in the pack. Check it out if you want to see the code without downloading the full binary pack, or just steal them for your own use. Note that downloading from Github directly won't work - you need either this provided pack or go manually fetch all the binaries yourself in order to just plug them in and start working.

Pack list

Installers:
(Updates in bold. All installers are 64-bit unless otherwise marked)
  • 7-Zip v19.00
  • 7-Zip v19.00 (x86)
  • Adobe Acrobat Reader DC v19.021.20058
  • Adobe AIR v32.0.0.125
  • Adobe Flash Player v32.0.0.303 (Chrome)
  • Adobe Flash Player v32.0.0.303 (Firefox)
  • Adobe Flash Player v32.0.0.303 (IE / ActiveX)
  • Apple iTunes v12.5.1.21
  • CDBurnerXP v4.5.8.7128
  • CutePDF v3.0 (PDF printer) (x86)
  • FileZilla Client v3.46.3
  • Gimp v2.10.14 (x86)
  • Google Chrome Enterprise v79.0.3945.117
  • Google Chrome Enterprise v77.0.3945.117 (x86)
  • Google Earth Pro v7.3.2
  • Java Development Kit 8 Update 231
  • Java Development Kit 8 Update 231 (x86)
  • Java Development Kit 11.0.5
  • Java Runtime 8 update 231
  • Java Runtime 8 update 231 (x86)
  • Java Runtime 10.0.2
  • KTS KypM Telnet/SSH Server v1.19c (x86)
  • LibreOffice v6.3.4
  • Microsoft .NET Framework v3.5.1 SP1 (x86)
  • Microsoft Silverlight v5.1.50918.0
  • Mozilla Firefox v72.0.1
  • Mozilla Firefox v72.0.1 (x86)
  • Mozilla Firefox ESR v68.4.1
  • Mozilla Firefox ESR v68.4.1 (x86)
  • Mozilla Thunderbird v68.4.1 (x86) (customized; read notes)
  • Notepad++ v7.8.2 (x86)
  • Pale Moon v28.8.1
  • Pale Moon v28.8.1 (x86)
  • Spark v2.8.3 (x86)
  • TightVNC v2.8.27
  • TightVNC v2.8.27 (x86)
  • UltraVNC v1.2.2.4 (x86)
  • VLC media player v3.0.8 (x86)
  • WinSCP v5.15.9 (x86)
Utilities:
  • Clean Up ALL Printers (purge all printers from target)
  • Clean Up Orphaned Printers (remove non-existent printers from the spooler)
  • Empty All Recycle Bins (force all recycle bins to empty on target)
  • Enable Remote Desktop
  • Install PKI Certificates
  • Reboot (force target reboot in 15 seconds)
  • Remove Adobe Flash Player (removes all versions)
  • Remove Java Runtime (removes JRE versions 3-11 using all means necessary)
  • Remove Microsoft Silverlight (removes all versions of Silverlight)
  • Temp File Cleanup
  • USB Device Cleanup. Uninstalls non-present USB hubs, USB storage devices and their storage volumes, Disks, CD-ROM's, Floppies, WPD devices and deletes their registry items. Devices will re-initialize at next connection

Instructions

  1. Import all .XML files from the \job files directory into PDQ deploy (it should look roughly like this after you've imported them).
  2. Copy all files from the \repository directory to wherever your repository is.
  3. All jobs reference PDQ's $(Repository) variable, so make sure it's set in preferences.

Package Notes

  1. Read the notes in the PDQ interface for each package, they explain exactly what that installer does. Basically, most packages use a .bat file to accomplish multi-step installs with the free version of PDQ. You can edit the batch files to see what they do; most just delete "All Users" desktop shortcuts and things like that. changelog-v##-updated-.txt has version and release history in addition to random notes where I complain about things like Reader DC and how much of a pain it is to build packages for.
  2. Thunderbird:
    • Thunderbird is configured to use a global config file stored on a network share. This allows for settings changes en masse. By default it's set to check for config updates every 120 minutes.
    • You can change the config location, update frequency, OR disable this behavior entirely by editing thunderbird-custom-settings.js.
    • A copy of the config file is in the Thunderbird directory and is called thunderbird-global-settings.js
    • If you don't want any customizations, just edit Thunderbird's .bat file and comment out or delete all the lines mentioning the custom config files.
  3. Microsoft Offline Updates - built using the excellent WSUS Offline tool. Please donate to them if you can, their team does excellent work.

Integrity

In the folder \integrity verification the file checksums.txt is signed with my PGP key (0x07d1490f82a211a2, pubkey included). You can use this to verify package integrity.
If you find a bug or glitch, PM me or post it here. Advice and comments are welcome and appreciated.

Donations

These packs will always be free and open-source, although donations are of course appreciated since all work done on them is in my spare time for free. If you feel like giving away your hard-earned cash to random strangers on the internet you may do so here:
Patreon
Bitcoin: 1Bfxpo1WqTGwRXZKrwYZV2zvJ4ggyj9GE1
Monero (preferred):
46ZUK4VDLLz3zapDw62UaS71ZfFBjH9uwhc8FeyocPhUHHsuxj5zfvpZpZcZFHWpxoXD99MVt6PnR9QfftXDV8s6CFAnPSo
"Do not withhold good from those to whom it is due, when it is in your power to act."
submitted by vocatus to sysadmin [link] [comments]

What Is Bitcoin Private Key: Beginner’s Guide

What Is Bitcoin Private Key: Beginner’s Guide
Most of the people in this sub probably already know what the Bitcoin private key is and how it works, but there are many newcomers who do not fully understand all the technical aspects of it. I hope you guys will find this guide useful.

Bitcoin Private Keys: The Basics

Let’s start with some main principles.
  • A private key is functionally similar to a password to your email account.
  • You need your private key to be able to receive the crypto someone sends you and to have access to your funds.
  • The BTC network does not store your private keys, they are generated and stored by the wallet software. There are different types of wallets.
Also, it is important to note that the private key concept does not apply exclusively to Bitcoin. Other cryptocurrencies use it too.
Now, let’s see how a private key looks and works.

Bitcoin Private Key Definition

Bitcoin private key is an alphanumeric piece of code. It includes letters and numbers, just like your public address.
However, while a public address is like your plastic card number, a private key is like your CVC. You know, those secret three digits on the back of a card?
A private address is created in a random manner when you get a cryptocurrency wallet. The possibility of creating two identical private keys is almost zero, due to the sophisticated encryption algorithm, we apply for the purpose.
In the BTC network, a private key contains 256 symbols, as we obtain it using the SHA256 encryption algorithm. This function always returns 256 symbols, no matter the input.
Bitcoin private key in various formats, including WIF.

Wallet Import Format (WIF)

Using such a long string of code is inconvenient, so a private key is often presented in WIF (Wallet Import Format). It’s a shortened version that includes only 51 characters (numbers from 0 to 9 and letters in the range of A-F) and begins with 5.
Here is a Bitcoin private key example in WIF:
5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF
WIF has a few advantages over a full BTC private key version. As we have said, it’s shorter and more convenient to use. Also, it contains special pieces of code that serve to check the address for typos and correct them automatically.
WIF associates with only one private key and can be easily converted back into it, using an established algorithm.

Encrypting Private Keys

If a key looks like WIF but starts with 6, it is an encrypted version of a private key. People encrypt keys to ensure an extra layer of protection. To obtain such a string of code, we apply another algorithm. To decode (decrypt) the key we need to enter the password that we set when we were encrypting it.

How Bitcoin Private Key Works

You probably know Bitcoin as a digital payment system. To explain how it works, it would be better to compare it to a web-messenger, with massages transferring value. These ‘value messages’ are BTC transactions.
And what role a private key plays in sending these financial messages?
Let’s take a look at a real-life example.
https://preview.redd.it/lt1gwme8seu41.png?width=1261&format=png&auto=webp&s=87137c6ad2566affef82a6513090022f7dbb931e

Using Private And Public Keys For a Transaction

Imagine you are sending 1 BTC to your friend Bill. You create a transaction and indicate yourself as the sender and Bill as the receiver of this amount. Then, you will broadcast the transaction to make the Bitcoin network aware of it.
  1. You start by choosing a private key. Using a special encryption algorithm, you derive a public key from it. You send this public key to Bill.
  2. You create a message for Bill and sign it with your digital signature. To obtain it, you pass your private key through a special encryption algorithm and attach the resulting code to the message. Every signature is unique, and you can use the same private address to produce an infinite number of them.
  3. Bill receives your message, public key, and signature and passes it through a signature algorithm. If it’s the message you sent, the algorithm returns ok.
Why we need a digital signature in the first place? There are three reasons. First, it tells the recipient that the message is from the sender he knows. Second, a digital signature makes it impossible for the sender to deny he sent the message. Third, it confirms that no one has altered the message in transit.
Unlike a traditional signature, a digital one cannot be forged. To produce it, you have to possess a secret private key.

https://preview.redd.it/8ta8ds3jseu41.png?width=624&format=png&auto=webp&s=79186fecbe58ecd8a393f644ad35e590361fbe86

Why Keeping Your Private Key Secret Is Important

As we have mentioned, anyone in possession of your private key can steal your funds anytime.
If your wicked colleague Alice gets your private key (because you carelessly left your paper wallet on your desk), she can use it to create a digital signature. She can then use that signature to sign a transaction that will look like yours for the network. For instance, Alice can send all your crypto to another address. You will never be able to cancel this transaction and you are highly unlikely to know that she made it.
For this reason, you should be very careful with your private keys. Never send it to anyone using a messenger, or an email client, or a social media channel. Don’t share photographs of your private key. Never store a private key in a Google Doc file.
Please note that some desktop wallet apps store your private key in a standard directory on your hard drive. This place is a honeypot for hackers who know you are a cryptocurrency user. That’s why it’s extremely important to have up-to-date anti-virus software installed on your device.
https://preview.redd.it/187j0ucmseu41.png?width=723&format=png&auto=webp&s=c9bccdd66ffabde2e623846c7e95930d5e62a625
Also, you may encrypt this wallet file to make it immune to malware. Many wallet apps provide this option. You will have to set a password to decrypt the private key, and the hacker will have to break this password to do it. If the password is strong, it will be a really difficult and time-consuming task.

Where To Store Private Keys: Mobile, Desktop And Hardware Wallets

As we have mentioned, the Bitcoin network does not store these keys. Instead, wallet services do it.

Mobile Wallets

Some of them allow you to keep and protect your private key, others do it automatically, applying various safety measures like 2FA or encryption. Note that nobody is responsible for it, your bitcoins will be gone if the service is hacked.

Desktop Wallets

Desktop wallets may be a good option. They provide a BTC public and private keys in the format of a file that you can download and import. You can protect this file with a strong password and safely store it on a hard drive. Don’t forget about safe storage for this drive, too. For instance, use a bank vault for this purpose.

Cold (Hardware) Wallets

Hardware wallets are the safest ones. They are small USB devices designed to store your funds and private keys offline, away from anyone who could steal them. For this very reason, hardware (or cold) wallets are impossible to hack. If you accidentally lose, damage or destroy such a device, you can recover your BTC and private keys using a backup phrase. The best-selling models of hardware wallets are Tresor and Ledger Nano S, supporting several popular coins.

https://preview.redd.it/jmpyl3yoseu41.png?width=803&format=png&auto=webp&s=ef70101a853eaaedea8d0fb5d2d1690cce16c989

Paper Wallets

These wallets are sheets of paper with BTC private keys and public address printed on them. Paper wallets look pretty basic and not very innovational, but it’s a safe way to store your BTC-related sensitive data. The main reason is that they are not connected to the Internet and thus are unreachable for malware attacks. This format is also immune to many mishaps that can affect electronic devices. To create a paper wallet you use a special web service like WalletGenerator.

P.S. Check out our blog if you are interested in more articles on crypto and finance
submitted by EX-SCUDO to Bitcoin [link] [comments]

Groestlcoin 6th Anniversary Release

Introduction

Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything.
The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years.
In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.

UPDATED - Groestlcoin Core 2.18.2

This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables.
NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.