Efficient Secure Group management for SSM
Abstract
The SSM model addresses some of the problems of deployment of IP multicast. However, a real commercial deployment of SSM requires security services. Our work proposes an architecture, called S-SSM, for securing the SSM model. S-SSM defines two mechanisms for access control and content protection. The first one is carried out through subscriber authentication and access permission. The second is realized through the management of a unique key, called the channel key, kch, shared among the sender and subscribers. The management of kch is based on a novel distributed encryption scheme that enables an entity to efficiently add and remove a subscriber without affecting other subscribers.