Foundations of Group Key Management - Framework, Security Model and a Generic Construction.
Naga Naresh Karuturi, Ragavendran Gopalakrishnan, R. Srinivasan, Chandrasekharan Pandu Rangan · 2008
Abstract—Group Key Establishment is fundamental for a variety of security mechanisms in group applications. It allows n ≥ 2 principals to agree upon a common secret key. This can further be classified into Group Key Exchange (or Group Key Agreement), where all the principals participate in the construction of the key, and Group Key Transport (or Group Key Distribution), where the key is chosen by a singe principal and is then securely communicated to the others. Both these techniques can be analyzed in the context of either static or dynamic groups. Dynamic Group Key Establishment is better known as Group Key Management (GKM), as it involves not only the initital key establishment, but also efficient key management when group members join or leave the group. Dynamic Group Key Exchange is also known as decentralized or distributed GKM, while Dynamic Group Key Transport is known as centralized GKM.