Abstract: With the development of science and technology,more and more network devices are connected to the wireless network.In order to ensure the legitimate users’ correct identification and connections,based on the Wen-Li authentication scheme,a novel two-way security authentication wireless scheme based on hash function(TSAWSH) was proposed.By using the send packet sequence number instead of of timestamp,the TSAWSH can avoid the influence to the certification process caused by the network delay and needn’t the strict clock synchronization between the devices.By comparing the security and complexity analyses with the Wen-Li scheme,the TSAWSH can effectively avoid the common network attacks,has higher safe property and less computational quantity,and also has lower computational complexity.The TSAWSH can effectively reduce the overhead of the actual system.

Key words: Two-way authentication,Hash function,Packet sequence number,Man-in-the-middle attack,Off-line password guessing attack