Importance

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Abstract

A user terminal for detecting forgery of an application program based on signature information and a method of detecting forgery of an application program using the user terminal are disclosed. The user terminal includes a signature information extraction circuit, a communication circuit and a forgery determination circuit. When the application program is installed on the user terminal, the signature information extraction circuit extracts the signature information of the application program on a platform level. When the application program is executed, the communication circuit transmits information of the user terminal and the application program to an authentication server on the platform level to receive original signature information of the application program from the authentication server, or receives the original signature information from a peripheral device paired with the user terminal. The forgery determination circuit compares the original signature information received from the authentication server or the peripheral device with the extracted signature information on the platform level to determine whether the application program is tampered. Accordingly, the user terminal may be protected from a tampered application program. In addition, since forgery of the application program is detected on the platform level, it may overcome limitations of tamper detection technologies on an application program level that can be evaded by an attacker.

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First Claim