This paper presents a
-predicate unforgeable and private) attribute-based signature (ABS) scheme in the
model. The security of the proposed ABS scheme is proven under standard assumptions, the decisional linear (DLIN) assumption and the existence of collision resistant (CR) hash functions. The admissible predicates of the proposed ABS scheme are more general than those of the existing ABS schemes, i.e., the proposed ABS scheme is the first to support general
predicates, which can be expressed using
gates as well as AND, OR, and Threshold gates, while the existing ABS schemes only support
predicates. The proposed ABS scheme is efficient and practical. Its efficiency is comparable to (several times worse than) that of the most efficient (almost optimally efficient) ABS scheme the security for which is proven in the generic group model.