InfoSec Seminar: Decentralized Traceable Attribute-Based Signatures

Speaker: Essam Ghadafi

Date/Time: 09-Apr-2015, 15:00 UTC

Venue: MPEB 1.03


Abstract: Attribute-based signatures allow a party to sign messages with fine-grained control over identifying information. The primitive has many real-life applications. Traceable attribute-based signatures additionally provide an anonymity revocation mechanism to enforce accountability and deter abuse which is important for many applications of attribute-based signatures.

We improve the state-of-the-art of the latter primitive by presenting a new security model to rectify some shortcomings in existing ones. In addition, we provide a generic construction as well as efficient instantiations which outperform existing ones. Our constructions have much lower computation and communication overhead for tracing signatures. 

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