What does HackerNews think of paperback?
Paper backup generator suitable for long-term storage.
Language:
Rust
Is that approach information-theoretically secure? Shamir Secret Sharing is, and the mathematics is very simple.
Note that the encryption step is, strictly speaking, not necessary for Shamir either. But there are benefits to encrypting the secret and only using SSS for the key (I'm not sure if that's how Horcrux works, but that's how my fairly-similar tool Paperback[1] works).
There's a cool paper-based backup tool that also uses Shamir Secret Sharing to let you distribute a bunch of paper copies to your friends to restore a file optically:
I wrote a tool for this[1,2], though it's still a work in progress (all the features work but I still need to finalise the QR data format and work on user-friendly interfaces).
[1]: https://github.com/cyphar/paperback [2]: https://youtu.be/GI9rKdM9rB8