Library · Crypto, word by word · Wallets and keys
What is an MPC wallet?
An MPC wallet uses multi-party computation: the signing key is split into shares held by separate parties or devices, and a set number of them work together to sign. No single share can sign alone, and the full key need never exist in one place.
What it means for you
Who holds the shares decides who controls the funds: if a company holds some, it can block or delay withdrawals. Check how many shares are needed, where each is kept, and whether you can export a usable backup if the provider shuts down.
How it works
In a threshold scheme the key is split into shares held by separate parties or devices, and a set number of them, say 2 of 3, run a joint protocol that produces a signature without the full key ever being rebuilt. NIST describes the goal as keeping security even if some of the components are compromised, and covers threshold ECDSA signing. The chain sees one ordinary signature for one key. That is the difference from multisig, where separate keys each sign and the blockchain's own script enforces the m-of-n rule.
Sources: NIST CSRC: Threshold cryptography, NIST IR 8214: Threshold schemes for cryptographic primitives, BIP-11: M-of-N standard transactions · checked 4 October 2026
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Educational content, not financial advice. Written by hand and checked against the source named above. Something wrong? Tell us and we reply within two business days.