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Providing security for messages in group communication is more essential andcritical nowadays. In group oriented applications such as Video conferencingand entertainment applications, it is necessary to secure the confidential datain such a way that intruders are not able to modify or transmit the data. Keytransfer protocols fully rely on trusted Key Generation Center (KGC) to computegroup key and to transport the group keys to all communication parties in asecured and secret manner. In this paper, an efficient key generation and keytransfer protocol has been proposed where KGC can broadcast group keyinformation to all group members in a secure way. Hence, only authorized groupmembers will be able to retrieve the secret key and unauthorized members cannotretrieve the secret key. Hence, inorder to maintain the forward and backwardsecrecy, the group keys are updated whenever a new member joins or leaves thecommunication group. The proposed algorithm is more efficient and relies on NPclass. In addition, the keys are distributed to the group users in a safe andsecure way. Moreover, the key generated is also very strong since it usescryptographic techniques which provide efficient computation.

A secure key transfer protocol for group communication