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Decentralized traceable attribute-based signatures

El Kaafarani, Ali; Ghadafi, Essam; Khader, Dalia

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Ali El Kaafarani

Essam Ghadafi
Senior Lecturer in Computer Science

Dalia Khader


We provide a formal security model for traceable attribute-based signatures. Our focus is on the more practical case where attribute management is distributed among different authorities rather than relying on a single central authority. By specializing our model to the single attribute authority setting, we overcome some of the shortcomings of the existing model for the same setting. Our second contribution is a generic construction for the primitive which achieves a strong notion of security. Namely, it achieves CCA anonymity and its security is w.r.t. adaptive adversaries. Moreover, our framework permits expressive signing polices. Finally, we provide some instantiations of the primitive whose security reduces to falsifiable intractability assumptions without relying on idealized assumptions. © 2014 Springer International Publishing.


El Kaafarani, A., Ghadafi, E., & Khader, D. (2014). Decentralized traceable attribute-based signatures. Lecture Notes in Artificial Intelligence, 8366 LNCS, 327-348.

Journal Article Type Conference Paper
Acceptance Date Feb 24, 2014
Publication Date Jan 1, 2014
Deposit Date Mar 24, 2017
Publicly Available Date Mar 24, 2017
Journal Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Print ISSN 0302-9743
Electronic ISSN 1611-3349
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 8366 LNCS
Pages 327-348
Book Title Topics in Cryptology – CT-RSA 2014
Keywords attribute-based signatures, security definitions, standard model
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