Identity authentication is an important component of network security to guarantee the security of the e-business information and service on open network. This article is going to give an intensive study and analysis to the major identity authentication technology, which point out that the application conditions of authentication scheme based on PKI digital certificates are not mature at present, and that current one-time password authentication system exist some safety loophole. So we propose an improved one-time password identity authentication scheme, which has some important merits include:(1)it improves the security and login efficiency; (2)it provides mutual authentication between the user and...