Integrating Multisignature Scheme into the Group Signature Protocol

This paper proposes two new variants of group signature protocols with and without distinguished signing authorities based on the multisignature signature scheme to reduce significantly the signature length and masking signers public keys. The proposed protocols do not include a secret sharing and knowledge proving procedure. Thus, these protocols allow a flexible modification of the group structure by the group manager. Compared to the known group signature protocols, our protocols are designed based on integrating the multisignature scheme into the group signature protocol.