Security Weakness of Flexible Group Key Exchange with On-Demand Computation of Subgroup Keys
Cryptography and Security
2010-08-09 v1
Abstract
In AFRICACRYPT 2010, Abdalla et al. first proposed a slight modification to the computations steps of the BD protocol, called mBD+P. Then they extended mBD+P protocol into mBD+S protocol. In this paper, we show that both of mBD+P and mBD+S protocols are vulnerable to malicious insiders attack. Further, we propose a simple countermeasure against this attack.
Keywords
Cite
@article{arxiv.1008.1221,
title = {Security Weakness of Flexible Group Key Exchange with On-Demand Computation of Subgroup Keys},
author = {Qingfeng Cheng and Chuangui Ma},
journal= {arXiv preprint arXiv:1008.1221},
year = {2010}
}