2008 | OriginalPaper | Chapter
Improvement of Efficiency in (Unconditional) Anonymous Transferable E-Cash
Authors : Sébastien Canard, Aline Gouget, Jacques Traoré
Published in: Financial Cryptography and Data Security
Publisher: Springer Berlin Heidelberg
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The practical advantage expected from transferable e-cash compare to non-transferable is the significant reduction of the interaction number between the bank and the users. However, this property is not fulfilled by
anonymous
transferable e-cash schemes of the state-of-the art. In this paper, we first present a transferable e-cash scheme with a reduced number of communications between the bank and the users that fulfils the
computational anonymity
property. Next, we present a transferable e-cash scheme with a reduced interaction number that fulfils the
unconditional anonymity
. This latter scheme is quite less efficient.