Abstract:

Multiproxy blind multisignature satisfies the security properties of both the multiproxy multisignature and blind signature. It permits that a group of original signers authorize a group of proxy signers who have no idea about the concrete content of the message. Based on DLP, a new broadcasting multiproxy blind multisignature and a new sequential multiproxy blind multisignature are proposed. Security of the new schemes is analyzed. Both of them satisfy the security requirement of the multiproxy multisignature scheme and the unforgeability and blindness for the blind signature.

Key words: discrete logarithm problem;multiproxy blind multisignature;unforgeability;unlinkability