Cryptology ePrint Archive: Report 2005/341
A Universally Composable Scheme for Electronic Cash
Abstract: We propose a scheme for electronic cash based on symmetric primitives.
The scheme is secure in the framework for universal composability
assuming the existence of a symmetric CCA2-secure encryption scheme,
a CMA-secure signature scheme, and a family of one-way,
collision-free hash functions. In particular, the security proof is
not in the random-oracle model. Due to its high efficiency,
the scheme is well-suited for devices such as smart-cards and mobile
phones. We also show how the proposed scheme can be used as a group
signature scheme with one-time keys.
Category / Keywords: cryptographic protocols / electronic cash
Publication Info: Extended abstract at Indocrypt 2005. This is the full version.
Date: received 19 Sep 2005, last revised 11 Oct 2005
Contact author: marten at nada kth se
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Version: 20051011:134740 (All versions of this report)
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