GROUP CIPHER SYSTEM FOR INTRANET SECURITY

A group-oriented cipher communication method is developed and implemen ted on a WWW-based (World Wide Web) network system. In this method, a group key common to all entities of the group is generated based on th e group name or the identities of entities belonging to the group. The group key, in turn, is used for encrypting the data being shared amon g the group via the WWW server. The data theft at the WWW cache sites on the intermediate communication line is prevented, establishing a un ified feature of the good WWW cache performance and security. A protot ype of our method proved the feasibility and the efficiency.