Certificateless Key Agreement Protocol

Certificateless cryptography aims at combining the advantages of identity based and public key cryptography in order to avoid the key escrow problem inherent in the identity based cryptography and cumbersome certificate management in the traditional public key infrastructure. A new two party certificateless key agreement protocol (CL-KA) is proposed and we proved it secure in the random oracle model (ROM). Our protocol only requires each entity to compute one pairing, up to now, it turns out to be the most efficient one of all the previously known CL-KA schemes.