MPC, short for multi-party computation, is a cryptographicCryptographyMathematical methods that protect information and prove who sent it, forming the basis of security in crypto. technique that lets several parties compute something together without any of them seeing the others' data. In crypto wallets, MPC is used to split a private keyPrivate keyA secret number that proves you own the crypto in your wallet. Whoever holds the private key controls the crypto. into several shares, so the full key never exists in one place.
How does MPC work?
Each key share is kept on a separate system, such as different servers or devices. When crypto is to be sent, the systems calculate the signature together. Each one contributes using its own share, but the shares are never put together.
The result is an ordinary signature. On the BlockchainBlockchainA public ledger where transactions are grouped into blocks, each linked to the one before, so past records can't be altered without it showing., the transaction looks exactly like one from a regular wallet.
Think of a recipe split between three cooks, each holding a third. They can cook the dish together, but none of them ever sees the whole recipe.
Why does it matter?
A single private key is a single point of failure. If an attacker gets it, they can take everything. With MPC, an attacker would have to break into several systems at once.
That is why many custodiansCustodianA company that holds crypto and the keys to it on behalf of customers, such as a licensed crypto exchange. use MPC. Myntkaup, for example, uses MPC technology from Fireblocks, so no single private key controls customer assets.
MPC is similar to MultisigMultisigA wallet set-up that needs signatures from more than one key before crypto can be sent, for example two out of three., but with multisig each party has its own full key and the transaction shows several signatures. MPC works on most networks, because the network only sees one ordinary signature.
Everything in Myntkaup Learn is written and regularly reviewed by the Myntkaup editorial team. It is for education and is not investment advice. Editorial policy. Updated 18 October 2026.