Skip to main content

Research Repository

Advanced Search

Attribute-based signatures with user-controlled linkability without random oracles

Ghadafi, Essam; El Kaafarani, ALI

Authors

Essam Ghadafi Essam.Ghadafi@uwe.ac.uk
Senior Lecturer in Computer Science

ALI El Kaafarani



Contributors

Máire O'Neill
Editor

Abstract

Attribute-Based Signatures (ABS) are a versatile cryptographic primitive and have many applications. They are a generalization of many widely-used signature-related notions such as group, ring and mesh signatures.
Attribute-Based Signatures with User-Controlled Linkability (ABS-UCL) add the notion of user-controlled linkability to ABS thus allowing users to anonymously and at will maintain a session with a verifier.
In this work, we provide the first constructions of ABS-UCL dispensing with heuristic assumptions such as random oracles. We start by providing a generic construction which avoids some of the inefficiency pitfalls of existing constructions. We then provide efficient instantiations supporting expressive signing policies. We also give a concrete construction for threshold policies yielding constant-size signatures.
Some of the building blocks we construct might be of independent interest.

Publication Date Dec 13, 2017
Deposit Date Oct 20, 2017
Peer Reviewed Peer Reviewed
Volume 10655
Series Title Lecture Notes in Computer Science
Book Title Cryptography and Coding
ISBN 9783319710457
DOI https://doi.org/10.1007/978-3-319-71045-7
Keywords attribute-based signatures, user-controlled linkability, standard model
Public URL https://uwe-repository.worktribe.com/output/877233
Contract Date Oct 20, 2017