What is Shamir Secret Sharing?

Shamir Secret Sharing (SSS) is a cryptographic algorithm invented by Adi Shamir in 1979. It splits a secret (like a seed phrase) into N shares, where only K of them (the threshold) are needed to reconstruct the original. Any fewer than K shares reveal zero information about the secret. It is mathematically proven, not just encrypted — even infinite computing power cannot recover the secret from fewer than K shares.

Why is Shamir backup better than a seed phrase?

A standard 12-word seed phrase is a single point of failure: anyone who finds it has full access to your wallet. Shamir Secret Sharing eliminates this by splitting the seed into multiple independent shares stored in different locations. Stealing one share yields nothing. You need a threshold number of shares to recover — so losing your phone doesn't lose your funds, and a single compromised backup doesn't compromise your wallet.

How does Veyrnox use Shamir Secret Sharing?

Veyrnox splits your seed across your device's Secure Enclave and your own cloud account (iCloud Keychain). Neither share alone is useful. If you lose your phone, the cloud share plus a new device reconstructs your wallet. Veyrnox never holds any share — the company has zero access to your keys at any time.

Which wallets support Shamir backup?

Trezor Model T supports SLIP-39 (a Shamir standard for hardware wallets). Veyrnox is the first mobile wallet to implement Shamir backup as the default recovery method — removing the traditional seed phrase from the user experience entirely.

Shamir Secret Sharingとは？ Veyrnox暗号バックアップ| Veyrnox

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