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- W1487450316 abstract "Off-line e-cash systems are the digital analogue of regular cash. One of the main desirable properties is anonymity: spending a coin should not reveal the identity of the spender and, at the same time, users should not be able to double-spend coins without being detected. Compact e-cash systems make it possible to store a wallet of O(2L) coins using O(L+λ) bits, where λ is the security parameter. They are called divisible whenever the user has the flexibility of spending an amount of 2l, for some l≤L, more efficiently than by repeatedly spending individual coins. This paper presents the first construction of divisible e-cash in the standard model (i.e., without the random oracle heuristic). The scheme allows a user to obtain a wallet of 2L coins by running a withdrawal protocol with the bank. Our construction is built on the traditional binary tree approach, where the wallet is organized in such a way that the monetary value of a coin depends on how deep the coin is in the tree." @default.
- W1487450316 created "2016-06-24" @default.
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- W1487450316 date "2013-01-01" @default.
- W1487450316 modified "2023-09-25" @default.
- W1487450316 title "Divisible E-Cash in the Standard Model" @default.
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- W1487450316 doi "https://doi.org/10.1007/978-3-642-36334-4_20" @default.
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