Multiparty computation (MPC) is a cryptography technique that allows multiple parties to conduct a transaction without compromising privacy. Basically, it looks like this: an individual in a group adds his data to the computation without revealing it to the other group members.
MPC cryptography solves the problem of having individuals maintaining control over their private keys. MPC, which is also called secure multiparty computation or privacy-preserving computation, enables crypto users to use the same key derived from segments generated by a group of non-trusting computers.
As such, the private key is used to sign a transaction, a collection of individual key segments. Notably, each computer executing the trade only has its own fragment of the key.
All things considered, multiparty computation is superior to using multi-sig and hardware security models in securing a crypto wallet.