A novel decentralized group key management using attribute based encryption

Abstract

Key management schemes establish a shared secret key between all the members in the group. Key management in multicast dynamic groups, where users can leave or join at their ease is one of the most crucial and essential part of secure communication. We proposed a new decentralized group key management scheme using attribute based encryption which provide no single point of failure, scalability and local rekeying for n members with a communication cost in the order of logn. Moreover, compared to other decentralized scheme like Lolus framework, we avoid the problem of key translation. Also in our approach, the subgroup controller only needs to store 2logn+1 keys for n members.