So far, majority of applications and websites mainly use traditional login method based on username and password. These identity authentication systems acquire two steps that users must execute. Firstly, users must complete registration. Secondly, they must enter correct username and password to login, only these two steps will spend seven or eight minutes. Moreover, the account can be forgotten, lost and stolen. So this paper proposes a technique which based on fingerprint verification. When logged in, people only need to brush fingerprint to verify identity.