MPC (Multi-Party Computation) is a cryptographic method of signing transactions where no single party ever holds the whole private key. The key is split into secret “shares” across multiple devices or parties; a threshold (e.g., 2-of-3, 3-of-5) collaboratively produces a valid signature.

Among the benefits are greatly reduced single-point-of-failure risk, flexible recovery policies, and enterprise workflows. MPC is different from multisig: multisig collects multiple distinct signatures on-chain, whereas MPC combines key shares off-chain into one signature that looks like a normal wallet to the network.