Improvement of Efficiency in (Unconditional) Anonymous Transferable E-Cash
- Cite this paper as:
- Canard S., Gouget A., Traoré J. (2008) Improvement of Efficiency in (Unconditional) Anonymous Transferable E-Cash. In: Tsudik G. (eds) Financial Cryptography and Data Security. FC 2008. Lecture Notes in Computer Science, vol 5143. Springer, Berlin, Heidelberg
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.
KeywordsElectronic cash anonymity transferability
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