Musig2 Introduction

Basic principles of Musig2

Bitcoin Taproot upgrade make the Musig2 multi-signature scheme compatible with it. Musig2 is a multi-signature scheme and a new variant of the MuSig signature scheme. MuSig allows multiple signers to create an aggregate public key from their respective private keys, and then jointly create a valid signature for the public key.

MuSig2 is a simple and highly practical two-round multi-signature scheme with advantages:

  • It is secure under concurrent signing sessions

  • Supports key aggregation

  • Outputs ordinary Schnorr signatures

  • Only requires two rounds of communication

  • Has signer complexity similar to ordinary Schnorr signatures.


[1] Basic principles of Musig2

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