Resumen de An Unbalanced Protocol for Group Key Exchange

Javier Herranz Sotoca , Jorge Luis Villar Santos

• In a group key exchange protocol, a group of players must compute a common secret key by using only public channels. There are many proposed protocols for group key exchange, and all of them are balanced or symmetric: all the players must perform the same amount of computation in the protocol.

  We propose an unbalanced group key exchange scheme: two of the players perform most of the computations of the protocol. This scheme can be useful in situations where players do not all have the same computational and communication resources. The security of the protocol is based on the Decisional Diffie-Hellman Assumption