Paper 2012/288
Fair Exchange of Short Signatures without Trusted Third Party
Philippe Camacho
Abstract
We propose a protocol to exchange Boneh-Boyen short signatures in a fair way, without relying on a trusted third party. Our protocol is quite practical and is the first of the sort to the best of our knowledge. Our construction uses a new non-interactive zero-knowledge (NIZK) argument to prove that a commitment is the encryption of a bit vector. We also design a NIZK argument to prove that a commitment toa bit vector $v=(b_1,b_2,...,b_\secparam)$ is such that $\sum_{i \in [\secparam]}b_i2^{i-1}=\Blinding$ where $\Blinding$ is the discrete logarithm of some public value $D=g^\Blinding$. These arguments may be of independent interest.
Metadata
- Available format(s)
-
PDF
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Fair exchangeshort signaturesgradual release of a secret
- Contact author(s)
- philippe camacho @ gmail com
- History
- 2012-11-18: last of 6 revisions
- 2012-05-29: received
- See all versions
- Short URL
- https://ia.cr/2012/288
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2012/288, author = {Philippe Camacho}, title = {Fair Exchange of Short Signatures without Trusted Third Party}, howpublished = {Cryptology {ePrint} Archive, Paper 2012/288}, year = {2012}, url = {https://eprint.iacr.org/2012/288} }