Abstract:

The currently protocols about WLAN mesh network node have some deficiency in roaming access process.Based on the security links which was established by EMSA initial authentication process and the message authentication code technology,the improved DH key exchange process is introduced.A new access authentication protocol which can effectively conform to the performance and security in roaming access process is proposed.The proposed protocol not only has the basic SK security,but also has a smaller delay.Moreover,the protocol is suitable to the mesh networks with the characteristic of topology change.The finished mutual access authentication process also complete the key generation,and the protocol can better hide the ID information of the terminal node.

Key words: roaming access, DH key exchange, provable security