Scalable Arbitrated Quantum Signature of Classical Messages with Multi-Signers

Abstract

Unconditionally secure signature is an important part of quantum cryptography.Usually,a signature scheme only provides an environment for a single signer.Nevertheless,in reai applications,many signers may collaboratively send a message to the verifier and convince the verifier that the message is actually transmitted by them.In this paper, we give a scalable arbitrated signature protocol of classical messages with multi-signers.Its security is analyzed and proved to be secure even with a compromised arbitrator.