Cryptanalysis of the RSA-CEGD protocol

Details Cryptanalysis of the RSA-CEGD protocol Cryptanalysis of the RSA-CEGD protocol

2008-12-03

arxiv.org/abs/0812.0686v1

Computer Science

Cryptography and Security

8 pages, 1 figure

Scientific paper

Recently, Nenadi\'c 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.

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