With rapid growth of mobile network linkage, the information exchange between portable and lightweight systems increases heavily. Exchanging confidential information within groups via unsecured communication channels is a high security threat. Consequently, the group participants need a common group key to enable encrypted broadcast messages. Efficient key management of secured group communication is a challenging task, if participants rely on low performance hardware and small bandwidth. Especially, dynamically changing group compositions generate large management expenditure. Considering these requirements, a Group-Key-Management concept including a communication protocol is proposed in this paper. It combines key formation and key distribution functionalists of existing concepts in order to reduce key computation and control message overhead. The lightweight G-IKEv2 protocol in combination with the key exchange concept of CAKE leads to an efficiently integrated solution.    «

With rapid growth of mobile network linkage, the information exchange between portable and lightweight systems increases heavily. Exchanging confidential information within groups via unsecured communication channels is a high security threat. Consequently, the group participants need a common group key to enable encrypted broadcast messages. Efficient key management of secured group communication is a challenging task, if participants rely on low performance hardware and small bandwidth. Espe...    »