Strongly unforgeable attribute-based group signature in the standard model

This paper proposes the first strongly unforgeable attribute-based group signature in the standard model. Our construction is based on Boyen´s and Boneh´s schemes, and is proved secure under the standard decisional Diffie-Hellman, subgroup decision and collision-resistant hashing assumptions. Compared with other attribute-based group signature schemes, this scheme delivers superior implementations in protecting the privacy of signers´ attributes, maintaining fixed signature size and providing flexible revocation algorithms.