Contributory Key Agreement in Groups: Quest for AuthenticationContributory Group Key Agreement • December 9th, 2006
We will look at two popular approaches to contributory group key agreement, Burmester-Desmedt and Group Diffie-Hellman protocols, and attempts to bundle im- plicit key authentication into the same package with them. Known attacks against some of these authenti- cated GKA protocols are presented to illustrate the dif- ficult nature of proving the security of a protocol. In these protocols authentication is brought to the proto- col with help of pre-shared passwords or authenticated auxiliary channels.
Contributory Key Agreement in Groups: Quest for AuthenticationContributory Group Key Agreement • November 7th, 2006
col. This protocol is presented for instance in [2] and there are Cliques variants that use this version instead of the unauthenticated GDH.2 for initial key agree- ment.
