4 ms·
Secret phrases are (typically) made of between 12 and 24 words.
by Udik 6y ago
Secret phrases are (typically) made of between 12 and 24 words.
- jhardy54 6y agoPlease try the above examples with 12 or 24 words if you think that will make it easier. Example: Secret: either "a b c d e f g h i j k l" or "a b c d e f g h i j k l m n o p q r s t u v w x" Participants: Alice, Bob, Carol, Dave Quorum: 2 Which parts of the secret does each participant receive? Every combination of participant pairs must be able to recreate the full secret No single participant may have the full secret. --- HN won't let me reply to the below comment so I'll copy and paste here: > It's actually trivially possible [...] for [...] very long (60 words+) passphrases. It is not. It doesn't matter if your passphrases is 6000 words, you can't have 4 participants with a quorum of 2. > https://iancoleman.io/slip39/ https://iancoleman.io/slip39/ This uses the exact cryptography that I said you'd need. This isn't just "mnemonic phrase split between three person's", it's literally Shamir's Secret Sharing.
- Udik 6y agoIt's actually trivially possible but the entropy for each shard will be abysmally low, requiring very long (60 words+) passphrases. So you're right, there's no trivial way (by hand) to split a 24 passphrase in 5 shards. However, it feels like a detail: such sharding is possible even if it's not trivial: https://iancoleman.io/slip39/ https://iancoleman.io/slip39/
- Udik 6y agoSorry, but what's wrong (apart the low entropy of each shard) with: Al Bob Car Dav a: - x x x b: x - x x c: x x - x d: x x x - e: - x x x f: x - x x ....etc?
- jhardy54 6y agoClever! I hadn't considered that.