Paper 2005/040

Unfairness of a protocol for certified delivery

Juan M. Estevez-Tapiador and Almudena Alcaide

Abstract

Recently, Nenadić \emph{et al.} (2004) proposed the RSA-CEGD protocol for certified delivery of e-goods. This is a relatively complex scheme based on verifiable and recoverable encrypted signatures (VRES) to guarantee properties such as strong fairness and non-repudiation, among others. In this paper, we demonstrate how this protocol cannot achieve fairness by presenting a severe attack and also pointing out some other weaknesses.

Metadata
Available format(s)
PDF PS
Category
Cryptographic protocols
Publication info
Published elsewhere. Technical report
Keywords
fair exchangenon-repudiationattacks
Contact author(s)
jestevez @ inf uc3m es
History
2005-02-16: revised
2005-02-16: received
See all versions
Short URL
https://ia.cr/2005/040
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2005/040,
      author = {Juan M.  Estevez-Tapiador and Almudena Alcaide},
      title = {Unfairness of a protocol for certified delivery},
      howpublished = {Cryptology ePrint Archive, Paper 2005/040},
      year = {2005},
      note = {\url{https://eprint.iacr.org/2005/040}},
      url = {https://eprint.iacr.org/2005/040}
}
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