SeedXOR
SeedXOR is a method for splitting a Bitcoin seed phrase into multiple mnemonic parts using XOR. All parts are required to reconstruct the original seed, so it is an all-or-nothing backup split rather than a threshold scheme.
How It Works
SeedXOR turns one seed into two, three, or four seed-like parts. The parts combine mathematically to recreate the original seed. Each part can be written as normal BIP39 words, which makes storage familiar.
It is not the same as Shamir's Secret Sharing. Shamir can be set up as a threshold, such as 2-of-3. SeedXOR is N-of-N: if you make three parts, you need all three. Lose one and the original seed cannot be reconstructed.
The point is geographic separation. A thief who finds one part should not have the whole wallet. But your recovery plan must survive fire, death, moving houses, and forgetfulness.
Key Points
- Splits a seed into multiple mnemonic parts
- Requires every part to recover the original seed
- Helps avoid one backup copy holding the whole secret
- Increases recovery complexity and coordination risk
- Test recovery with small funds before trusting it with serious value