On the Classic Protocol for MPC Schnorr Signatures

ePrint Report: On the Classic Protocol for MPC Schnorr Signatures

Nikolaos Makriyannis

The classic MPC protocol for Schnorr Signatures (Classic Schnorr) consists of a simple three-round process for the signing operation, and the protocol is essentially as efficient as the underlying non-MPC scheme (modulo the round-complexity). In particular, Classic Schnorr does not contain any ZK proofs, not even for key-generation, and the only cryptographic “machinery” it uses is the underlying hash function. In this paper, we show that Classic Schnorr …

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