publication . Part of book or chapter of book . Other literature type . 2005

Compact e-cash

Camenisch, Jan; Hohenberger, Susan; Lysyanskaya, Anna;
Open Access
  • Published: 01 Jan 2005
  • Publisher: Springer Berlin Heidelberg
This paper presents efficient off-line anonymous e-cash schemes where a user can withdraw a wallet containing 2l coins each of which she can spend unlinkably. Our first result is a scheme, secure under the strong RSA and the y-DDHI assumptions, where the complexity of the withdrawal and spend operations is ${\mathcal O}(\ell + k)$ and the user's wallet can be stored using ${\mathcal O}(\ell + k)$ bits, where k is a security parameter. The best previously known schemes require at least one of these complexities to be ${\mathcal O}(2^{\rm \ell}\cdot k)$. In fact, compared to previous e-cash schemes, our whole wallet of 2l coins has about the same size as one coin ...
arXiv: Computer Science::Cryptography and Security
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Part of book or chapter of book
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Other literature type . 2005
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