Provably-secure electronic cash based on certificateless partially-blind signatures

Authors:
Lei Zhang;Futai Zhang;Bo Qin;Shubo Liu
Affiliations:
East China Normal University, Software Engineering Institute, Shanghai, China and Universitat Rovira i Virgili, Department of Computer Engineering and Mathematics, UNESCO Chair in Data Privacy, Ca ...;Nanjing Normal University, School of Computer Science and Technology, China;Universitat Rovira i Virgili, Department of Computer Engineering and Mathematics, UNESCO Chair in Data Privacy, Catalonia, Spain and Xi'an University of Technology, School of Science, Department o ...;Wuhan University, School of Computer, China
Venue:
Electronic Commerce Research and Applications
Year:
2011

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Abstract

We extend the partially-blind signature approach into certificateless public key cryptography to eliminate the key escrow problem that occurs with identities in public key cryptography. We also formalize conditions for security for certificateless partially-blind signature schemes. We also present a practical certificateless partially-blind signature scheme to make electronic cash untraceable. We prove the scheme to be unforgeable in the face of message attacks under the computational Diffie-Hellman assumption.