Toward pairing-free certificateless authenticated key exchanges

摘要: Certificateless authenticated key exchange (CL-AKE) protocols do not suffer from intricate certificate management or heavy trust reliance on a third party. Unfortunately, these advantages are partially counteracted in most CL-AKE which require expensive pairing operations. This paper proposes new protocol without requiring any operation during the execution, although map may be required to realize Decisional Diffie-Hellman (DDH) oracle security proof. With implicit authentication, we illustrate modular proofs model incorporating standard definitions of AKE and certificateless cryptography. Analysis shows that our is also efficient.