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Paper 2015/086
Practical Compact E-Cash with Arbitrary Wallet Size
Patrick Märtens
Abstract
Compact e-cash schemes allow users to withdraw a wallet containing $K$ coins and to spend each coin unlinkably. We present the first compact e-cash scheme with arbitrary wallet size $k \leq K$ while the spending protocol is of constant time and space complexity. Known compact e-cash schemes are constructed from either verifiable random functions or bounded accumulators. We use both building blocks to construct the new scheme which is secure under the $q$-SDH, the $y$-DDHI and the SXDH assumptions in the random oracle model.
Metadata
- Available format(s)
- Publication info
- Preprint. MINOR revision.
- Keywords
- E-Cashcompactconstant-sizearbitrary wallet sizeaccumulatorpairings
- Contact author(s)
- patrickmaertens @ gmx de
- History
- 2015-02-14: received
- Short URL
- https://ia.cr/2015/086
- License
-
CC BY