Identity-Based Blind Signature Scheme with Message Recovery over SM9

The current blind signature scheme over SM9 demands substantial resources for practical implementation. To address this issue, a novel identity-based blind signature scheme with message recovery over SM9 is proposed by combining message recovery technology, hiding the message in the signature to reduce the transmission bandwidth for the signature information. The security of this scheme is analyzed by using the provable security method. And it proves that this scheme is EUF-CMIA secure and the blindness can be guaranteed. Through testing and analysis, at the clock frequency of 500 MHz, our scheme requires 6.128 milliseconds for each signature after initialization, which is faster than existing identity-based message recovery blind signature algorithms. The scheme reduces the transmission bandwidth to 75.6% compared to the normal SM9 signature algorithm. By comparing with other existing SM9 blind signature schemes, this scheme has lower data transmission volume, reduces bandwidth resource consumption, and offers promising applications in bandwidth-limited environments.