Security

Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model

Date Added: Dec 2011
Format: PDF

This paper presents a fully secure (adaptive-predicate unforgeable and private) Attribute-Based Signature (ABS) scheme in the standard 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 non-monotone predicates, which can be expressed using NOT gates as well as AND, OR, and Threshold gates, while the existing ABS schemes only support monotone predicates.