How does the option to hide private key data work? Is it just a switch you can turn on/off or does it require you to enter a PIN code or password to enable/disable the visibility of private keys?
When you say "Disable backup tools" what does it mean?

Hello Bitcointalk forum!

With our latest v24.03.0 release (https://github.com/selfcustody/krux/releases) having been leaked already by excited contributors and project supporters, we wanted to officially start a thread here and introduce our FOSS bitcoin wallet project. That way our devs can focus on building, and our internz can focus on managing users via social media.

For those that haven't heard of the project yet, I suggest you check out our excellent documentation https://selfcustody.github.io/krux/getting-started/ as well as our Twitter page @selfcustodykrux

The crux of it, pun intended, is a bitcoin hardware signer which consists of open-source firmware that transforms 1/5 (soon to be 6) off-the-shelf Kendryte K210 devices, such as the Maix Amigo, M5StickV and more, into versatile Bitcoin transaction signers. Bitcoin was meant to be used without trusting middlemen, and in the spirit of DIY that is why we build Krux.

For all the info on our latest release as it's too much to list, check out the thread here: https://twitter.com/selfcustodykrux/status/1768569044175650904 or of course, the release notes on github: https://github.com/selfcustody/krux/releases/tag/v24.03.0

Krux wallet is turning any M5StickV device into an airgapped hardware wallet.
I knew before that M5Sticks are great for making DIY wallets like this but just now I noticed model M5StickV that is great because it has built in camera and battery, and there is no WiFi or Bluetooth connection.
It is fully Open Source, written in MicroPython and it is using QR codes for communication with other devices.
This is still fully functional wallet but it is still in alpha testing so please report any bugs you notice to developer or his Krux github page.
Krux wallet is not generating seed words so this should be done manually offline and you can import them yourself or with QR code.

Shopping list:

 - M5StickV ~ $30 - $50 (included with screen, camera, buttons and battery)
 - MicroSD card

Code:

 - Krux Wallet github (by Jeff jreesun )
 - Firmware, Requirements, Building, Installing

Website with step by step installation guide:
https://selfcustody.github.io/krux/

For support installing, using Krux wallet or any other questions you can visit https://matrix.to/#/#krux:matrix.org

Krux Android App for testing:
https://github.com/odudex/krux_binaries/tree/main/Android

---

Use at your own risk and only store coins you are willing to lose!

I just noticed that with the latest firmware version you released a few months ago, a new device has become compatible with the Krux DIY hardware wallet. It's the Yahboom K210 module. It's a touchscreen device that runs on Linux and has a touchscreen. It's cheap and can be bought for $50 to $60 at Amazon.

http://www.yahboom.net/study/K210-Developer-Kit

Dude, your post is not readable at all, please reduce the size of those images to much smaller size, and edit your post...

Is Jeff still active and contributing anything, or he left the project for good?
I was always confusing Jeff and Odudex and I was thinking this is the same person, plus there are some other guys who are talking about Krux in forum

PS
I saw Crypto Guide released new VIDEO instructions for building and verifying Krux from the source code.

Krux has undergone such huge improvements over the past year that maybe it's good to have a new thread for it?  Maybe not.  I don't know.

I'm a huge fan of Krux.  I mean, come on now...  look at this thing:

https://www.talkimg.com/images/2023/09/23/PU0Qz.jpeg

That UI is dead simple, which means it's easy to use.  It runs on Maix Amigo hardware, which has a large touchscreen and can be found for as little as $50.

Air gapped.
Stateless.
Seed QR - with encryption!
Passphrase QR - no more typing!

It's easier to load a seed and passphrase on Krux than it is to enter the PIN to unlock a Trezor/Ledger/ColdCard.

Let's load a seed:

https://www.talkimg.com/images/2023/09/23/PUlf2.jpeg

Note that where it says "From Storage," they mean from a micro SD card.  Not only can you save seeds to micro SD...  you can save encrypted seeds.  And you can scan a QR of the encryption key.  Don't have a QR for your decryption passphrase?  In the Tools menu, there's an option to make one.

Here's an encrypted Seed QR I made as as an example.  And here's the key to decrypt it:


Krux can make and scan passphrase QRs too.

https://www.talkimg.com/images/2023/09/23/PaHeZ.jpeg

The Maix Amigo's large touchscreen makes everything you'd do with a hardware wallet so much easier.

https://www.talkimg.com/images/2023/09/23/PaMIN.jpeg

https://www.talkimg.com/images/2023/09/23/Pam7a.jpeg

https://www.talkimg.com/images/2023/09/23/PaPUo.jpeg

Want to make a SeedQR?  It's easy, especially thanks to the large screen.

https://www.talkimg.com/images/2023/09/24/PaNfW.jpeg

https://www.talkimg.com/images/2023/09/23/Panf3.jpeg

https://www.talkimg.com/images/2023/09/23/PaCKw.jpeg

Does Krux do Testnet?  You bet.  "Network" means Bitcoin Mainnet or Testnet.

https://www.talkimg.com/images/2023/09/23/PaUAP.jpeg

I especially appreciate that the word "test" stays on the screen when you're using Testnet, to help avoid making any mistakes.  Well done!

https://www.talkimg.com/images/2023/09/23/PauUG.jpeg

If somebody made high end hardware for this and released it for $200, the hype would be insane.

Krux is a fantastic project.  Pair it up with BlueWallet or Sparrow as a companion app, and you've got a killer combo.

EDITED to add:  Hopefully I don't come off as too much of a fanboy for this project...  but I don't really care if I do.  I'm a diehard Bitcoiner, and I hate seeing people lose their coins due to poor hardware wallet design.  Some hardware wallets hide the passphrase feature.  Others only show portions of addresses, or they expect the user to scroll through an address on a tiny screen, which makes transactions less safe.  But having a huge screen that shows you everything makes safety easier.  The ability to scan passphrases removes potential for typos, which makes safety easier.  Encrypted seed QRs make safety easier.  This stuff matters.

Hey there
Are you the official representative for Krux?

I know several members who are active talking about Krux, and I created first Krux topic few years ago, but we can redirect all discussion here if you want.
This is the old topic:
https://bitcointalk.org/index.php?topic=5350905.0