How to split your BIP-39 mnemonic into a 2 of 3, using simple math you can do in your head. \ stacker news ~bitcoin

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How to split your BIP-39 mnemonic into a 2 of 3, using simple math you can do in your head.tylerchambers.net/posts/2of3/

10 sats \ 9 comments \ @nottylerchamb 6 Mar 2022 bitcoin freebie

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11 sats \ 3 replies \ @jimmysong 7 Mar 2022

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

10 sats \ 1 reply \ @nottylerchamb OP 7 Mar 2022 freebie

I dig buidl! SLIP-39 is super cool and useful, would love to see it in more places.

0 sats \ 0 replies \ @247bf84fda 25 Aug freebie

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0 sats \ 0 replies \ @247bf84fda 25 Aug freebie

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10 sats \ 3 replies \ @nottylerchamb OP 6 Mar 2022 freebie

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!

0 sats \ 1 reply \ @nottylerchamb OP 7 Mar 2022 freebie

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 😉

0 sats \ 0 replies \ @247bf84fda 25 Aug freebie

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0 sats \ 0 replies \ @247bf84fda 25 Aug freebie

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