Cyber Security Seminar on Pairing-Based Digital Signature Schemes
In this work we will explore some of our recent work regarding studying the efficiency of pairing-based digital signature schemes.
We provide a framework for defining a large subset of pairing-based digital signature schemes which we call Partially Structure-Preserving Signature (PSPS) schemes. PSPS schemes are similar in nature to structure-preserving signatures with the exception that in PSPS schemes messages are scalars from $\Z^n_p$ instead of being group elements. This class encompasses various existing schemes which have a number of desirable features which makes them an ideal building block for many privacy-preserving cryptographic protocols. We provide various impossibility and lower bound results for variants of this class. We also give a number of optimal constructions. Finally, we give a generic framework for transforming variants of PSPS schemes into structure-preserving ones.
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Meeting ID: 91509476791
Dr. Essam Ghadafi (UWE)
Dr Essam Ghadafi is a senior lecturer at the University of the West of England. His research interests span over different aspects of Cryptography & Information Security. He obtained his PhD from the University of Bristol (supervised by Prof Nigel Smart and Dr Bogdan Warinschi) in 2012. Previously, he worked at the University of Bristol as a postdoctoral researcher. He also worked with Prof Jens Groth at University College London as a research associate. He published and presented various papers at top peer-reviewed journals and international conferences.