MuSig2

A cryptographic protocol for creating Schnorr-based multi-signatures in Bitcoin. An improvement over the original MuSig protocol, MuSig2 offers greater security and simplicity by enabling a group of signers to produce a single signature representing their collective consent for a specific transaction. MuSig2 can also provide greater resistance against certain attacks, such as key cancellation, rogue key and replay attacks.

More information on MuSig2 can be found reading its official whitepaper.