Abstract: In order to enable users with different identities to access the specified information resources and refuse unauthorized illegal users to access the network resources, so as to protect the information security of network participants, aiming at the problem that identity authentication and key agreement protocols are difficult to achieve user anonymity, three-factor security and perfect forward security, a new three-factor authentication and key agreement protocol are proposed. The protocol can be applied to multi-server network environment. The security proof and performance analysis of the new protocol show that the new protocol is safe, practical and can effectively resist all kinds of known attacks.

Key words: authentication; , multi-server; , three-factor; , key agreement