MPC wallet
An MPC wallet is a wallet where the private key never exists in one piece: it is split into shares held by different parties, and they sign together without ever putting the key back together.
How it works
MPC stands for multi-party computation. The key is created directly as several shares, for example on your phone, on the provider's server and in a cloud backup. To sign, the required number of shares take part in a joint calculation, and no party sees the others' pieces.
To the blockchain the result looks like an ordinary single-key signature. So MPC works on networks with no built-in multisig, and fees are the same as a normal transfer. That is the difference from multisig, where the M-of-N rule is written on-chain.
MPC is used by "seedless" wallets and institutional custodians. The upside is no single point of failure and easier recovery. The downside is that you depend on a specific provider and its software: if the service shuts down, you need to know in advance how to get your funds out.
A wallet splits the key into 3 shares: your phone, the company's server and an encrypted copy in your cloud, with a 2-of-3 threshold. You lose your phone and recover using the server and cloud shares. A hacker who breaches only the company server has one share, which is not enough to move 1 ETH.
The mistake is assuming an MPC wallet is automatically non-custodial and permanent. If the provider holds one share and shuts down, you can get stuck without a recovery path. Before storing a large amount, find out who holds the shares, how recovery works and whether you can export the key or withdraw without the provider.
Questions and answers
What is an MPC wallet in simple terms?
It is a wallet whose key is cut into pieces held by different parties. They can only sign a transfer together, and the full key is never stored anywhere.
Does an MPC wallet have a seed phrase?
Usually not; recovery uses the key shares and, for example, a cloud backup instead. Details depend on the provider.
Which is safer, MPC or multisig?
Both remove the single point of failure. Multisig is transparent on-chain, while MPC is cheaper and works on more networks but leans more on the provider's software.
Related terms
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Updated: 2026-10-19