Key-exchange protocol using pre-agreed session-ID

Technical applications for various uses have been proposed in communication technology in recent years. Although especially the Internet and radio communications are used daily it is known that eaves-dropping is easy and the related problem has occurred mostly, especially privacy. In this paper, we introduce Pre-Agreed Session ID (PAS) and formalize a key-exchange protocol using it. PAS is a identification which is a disposable unique value used for every session to protect identity from the attacker. The security notion of identity concealment is formulized in this paper. Moreover, we propose a secure key-exchange protocol using PAS under the cryptographic primitives. Furthermore, we argue about the problems which arise when PAS is introduced.