Abstract: Traditional password is easy to leak.People try to find a new kind of security certification.Behavior fingerprint is the users operating data on the phone which consists of a lot of elements.These data can be used as users identity information.In this paper, behavior fingerprint is used in mobile security certification and an Android application is developed.Based on modeling and identifying algorithm, class I and Class II support vector machine (SVM)are jointed and applied as identifying method, thus improved the accuracy for identifying users behavior.