SLIP-39

SatoshiLabs Improvement Proposal 39 — a Shamir Secret Sharing scheme that splits a master seed into M-of-N shares, each encoded as a word list. Any M shares can reconstruct the seed; fewer than M reveal nothing. SLIP-39 is supported by Trezor Model T and a few open-source tools. It is a different format from BIP-39 — the two are not interchangeable.