QR-Code-generator VS shc-extractor

Make a hidden Veracrypt vault on cold computer. Inside the Veracrypt vault save Keepassxc vaults. Store your seeds inside the Keepassxc vaults. For a paper backup, encrypt your seeds using an offline AES256/512 text encryptor/decryptor. Encode the encrypted text using an offline qrcode generator. Print out the qrcode. Test recovery using a dummy wallet. Be sure you can scan and decrypt. Bonus: Laser etch the qrcodes on metal plates. Make a multi-factor recovery vault, in case you forget your passwords. Shimar's secret sharing scheme is a useful tool for making your recovery vault. Never store your seed unencrypted anywhere, ever. Never input your seed on an online computer, ever. Always protect your seeds with something you know (password), something you have (vaults and keyfiles). Do not upload your vault to the cloud. Keep backups in multiple locations. Necessary tools: Cold computer: Any old computer will do. Just physically disable network access. Veracrypt: https://www.veracrypt.fr/code/VeraCrypt/ KeepassXC: https://keepassxc.org/ Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/ Cross-platform, open source QR code generators: https://kazuhikoarase.github.io/qrcode-generator/js/demo/ https://github.com/amanuel/JS-HTML5-QRCode-Generator https://github.com/nayuki/QR-Code-generator Shamir's Secret Sharing: https://github.com/paritytech/banana\_split

Necessary tools: Cold computer: Any old computer will do. Just disable network access. Veracrypt: https://www.veracrypt.fr/code/VeraCrypt/ KeepassXC: https://keepassxc.org/ Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/ Cross-platform, open source QR code generators: https://kazuhikoarase.github.io/qrcode-generator/js/demo/ https://github.com/amanuel/JS-HTML5-QRCode-Generator https://github.com/nayuki/QR-Code-generator Cross-platform, open-source text string encryptor. https://github.com/a3diti/aes256-offline/ Shamir's Secret Sharing: https://github.com/paritytech/banana\_split

I probably know this only because back in time I wrote a QR code generator in JavaScript [1] which was also one of such libraries reviewed by Nayuki [2], and as I haven't actually implemented a decoder my knowledge stops there. Sorry :-)

[1] https://github.com/lifthrasiir/qr.js

[2] https://www.nayuki.io/page/qr-code-generator-library

I guess it helps to understand how to generate a QR code: https://www.nayuki.io/page/qr-code-generator-library (see also the references at the end)

Good luck. ;-)

https://en.cppreference.com/w/cpp/numeric/random + https://github.com/nayuki/QR-Code-generator/tree/master/cpp Generate QR code using random number. No need for power hungry blockchain.

I have not spun it up myself I have just put urls into this page https://www.nayuki.io/page/qr-code-generator-library I have assumed (maybe incorrectly) that the project would function the same.

I’ve used this in the past and haven’t had unreadable codes https://github.com/nayuki/QR-Code-generator

Did you consider a GDScript implementation instead? Having to rebuild the engine is a bit of a hassle, especially since you need to rebuild for every supported platform in order to export. I see there is a Python version of the lib: https://github.com/nayuki/QR-Code-generator/blob/master/python/qrcodegen.py and generating codes is probably never performance-critical.

For my own website I used the javascript library from https://www.nayuki.io/page/qr-code-generator-library Since those are just static files the actual generating of the qr code is done by the browser so nothing has to happen on the host.

There's even some pre-built software to help you do it.

It's not. It is encoded based on a specification that anyone can look at. You can scan the code to get the shc string. Then use this tool to extract the information from it.

See: https://github.com/obrassard/shc-extractor

The protocol is fully documented and there is open sourced code which will extract the information, if you want to know what it contains.

Source