| Summary: | 碩士 === 國立中興大學 === 資訊科學與工程學系 === 102 === The Key agreement protocol allows two or more parties to establish a shared session key by exchanging messages over an open network. In 1976, Diffie and Hellman proposed the first key agreement protocol which enables two parties to establish a shared session key. Such protocol does not provide authentication of the communicating parties and is thus vulnerable to man-in-the-middle attack. In 2000, Joux proposed the first one round tripartite key agreement protocol. In fact, their protocol is also suffering from man-in-the-middle attack. Over the years, different approaches with authentication have been widely proposed to slove the problem.
To overcome the drawbacks of managing certificates in traditional public key infrastructure and solving the key escrow problem in ID-based cryptosystem. Al-Riyami and Paterson first invented certificateless public key cryptography in 2003. Later on, Gao et al. proposed the first certificateless authenticated tripartite key agreement protocol. In this thesis, we present an efficient authenticated tripartite key agreement scheme based on certificateless public key cryptography. Our protocol is more efficient than Gao et al.’s, and we also show that the proposed scheme can meet the security requirements.
|
|---|
