The security in «Information Technology—Telecommunications and information exchange between Systems—Local and metropolitan area networks—Specific requirements—Part 11:Wireless LAN Medium Access Control(MAC)and Physical Layer(PHY)Specifications» is WAPI mechanism. On Dec 26, 2002, the National Key Management Committee organized correlated experts to make a censor on the WAPI mechanism; the leader of the committee is the member of Chinese Project College, and the people who took part in the censor includes 10 experts and in the end the draft was unanimously agreed. The re-check file is the national security office [2002] No.281 “the re-check about agreeing with «wireless LAN media access control and physical specification (draft)» chapter 8 “authentication and encryption” under censor”.