2013 | OriginalPaper | Chapter
Anonymous Transferable Conditional E-cash
Authors : Jiangxiao Zhang, Zhoujun Li, Hua Guo
Published in: Security and Privacy in Communication Networks
Publisher: Springer Berlin Heidelberg
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We present the first anonymous transferable conditional e-cash system based on two recent cryptographic primitives, i.e., the Groth-Sahai(GS) proofs system and the commuting signatures, thus the unlinkability and anonymity of the user is obtained. We solve an open problem by dividing the deposit into two parts, so that the user is unlinkable in the transferrable protocol and the deposit protocol. Comparing the existing conditional e-cash, the size of the computation and communication of our scheme is constant.