International Journal of Engineering and Technology

This paper is proposing a new cryptosystem termed as Asymmetric group key agreement cryptosystem, where a selected set of group users broadcast their contribution to other group members by keeping their own information secret. Each group user collects broadcast message from other group participants and derive a common group key. If any user is interested to send message to group, he decides the session key and then encrypts message using the session key. The decided session key is encrypted using the derived common group key and securely communicated to other group members. Group members will use their secret information to retrieve the session key, which is used to decrypt the received message. Also, the proposed techniques performance is compared against X.Du et al.[26], L.LU et al. [27] and J.Beak[28] protocols. Observed that the proposed technique is taking less computation time than other existing techniques.