Rethinking the security of some authenticated group key agreement schemes.
Qiang Tang, Chris J. Mitchell · IACR Cryptology ePrint Archive · 2004
In this paper we analyse three improved authenticated group key agreement schemes, all of which are based on the conference key distribution systems proposed by Burmester and Desmedt. We show that all the schemes suffer from a type of impersonation attack, although these schemes are claimed to be secure.