I wrote a shamir secret sharing scheme to back up a BIP-39 in the buidl library.
You can have k-of-n and each share has the same number of words as the combined one. So for example if you have a 24-word seed, you can split to 3 24-word shamir shares, of which you need 2 to construct the original 24 word seed.
oops- apparently I was off by 1 for some of the word indexes 🤦♂️ this is why I put the big warning at the top! lol Everything should be correct now, but check my work before you go splitting up your life savings 😉
I wrote a shamir secret sharing scheme to back up a BIP-39 in the buidl library.
You can have k-of-n and each share has the same number of words as the combined one. So for example if you have a 24-word seed, you can split to 3 24-word shamir shares, of which you need 2 to construct the original 24 word seed.
Code is here: https://github.com/buidl-bitcoin/buidl-python/blob/main/buidl/shamir.py
I dig buidl! SLIP-39 is super cool and useful, would love to see it in more places.
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Hi Stacker News,
I just threw together a quick blog post on splitting your mnemonic up for geographically distributed storage.
I don't see anyone talking about this method, but it's information-theoretically secure and super easy to do.
Any feedback welcome!
oops- apparently I was off by 1 for some of the word indexes 🤦♂️
this is why I put the big warning at the top! lol Everything should be correct now, but check my work before you go splitting up your life savings 😉
deleted by author
deleted by author