Efficient Key agreement protocol using Proxy server for Wireless communication

A key agreement protocol is the most important part to establish a secure cryptographic system and the effort to standardize the key agreement protocols is in rapid progress. Several efficient and secure key agreement protocols have been proposed so far since Diffie-Hellman proposed a public key agreement system in 1976. But, since Diffie-Hellman based key agreement protocols need a lot of computation to establish the session key, they are not proper to apply wireless Internet environment. In this paper, we propose the efficient key agreement protocol using proxy server. The proposed protocol supports the security of the Diffie-Hellman based protocol and the computation work of mobile user can be decreased using proxy server. Key-Words : Key agreement protocol, Wireless Internet, Diffie-Hellman problem, proxy-based cryptosystem, Active attack