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- W2407317343 startingPage "318" @default.
- W2407317343 abstract "Divisible e-cash systems allow a user to withdraw a wallet containingK coins and to spend k ≤ K coins in a single operation, respectively. Independent of the new work of Canard, Pointcheval, Sanders and Traore (Proceedings of PKC ’15) we present a practical and secure divisible e-cash system in which the bandwidth of each protocol is constant while the system fulfills the standard security requirements (especially which is unforgeable and truly anonymous) in the random oracle model. In other existing divisible e-cash systems that are truly anonymous, either the bandwidth of withdrawing depends on K or the bandwidth of spending depends on k. Moreover, using some techniques of the work of Canard, Pointcheval, Sanders and Traore we are also able to prove the security in the standard model. Furthermore, we show an efficient attack against the unforgeability of Canard and Gouget’s divisible e-cash scheme (FC ’10). Finally, we extend our scheme to a divisible e-cash system that provides withdrawing and spending of an arbitrary value of coins (not necessarily a power of two) and give an extension to a fair e-cash scheme." @default.
- W2407317343 created "2016-06-24" @default.
- W2407317343 creator A5009891477 @default.
- W2407317343 date "2015-01-01" @default.
- W2407317343 modified "2023-09-23" @default.
- W2407317343 title "Practical Divisible E-Cash." @default.
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