Abstract: Disclosed are a device and a method to display a fingerboard of a mobile vibration guitar in a mobile device, such as a cellular phone. A mobile device screen, such as a cellular phone screen, is too small to display a long fingerboard without causing difficulties when playing. The present invention is provided to display a whole fingerboard within a small screen of a mobile device without any difficulties when playing. A player may play the mobile virtual guitar by applying various playing techniques used to play the real guitar. The fingerboard is directly played with fingers on a mobile screen that is a touch screen supporting a multi-touch operation. Since a movement recognition sensor is attached inside the mobile device, and the fingerboard on the screen is synchronized with the longitudinal movement of the fingers, the fingerboard may move in the same direction and at the same speed as the movement of the fingers.

Abstract: The present invention is proposed to solve the problem of high cost of an ordinary OTP token and the problem of vulnerability to hacking of a mobile OTP, for which an OTP program is mounted to solve the problem of high cost. There is provided a user authentication system and a method thereof, in which a user sets an image password as a fixed key, a query terminal outputs a query screen on which a created OTP is divided into pieces and matched to images of the fixed key, the user who confirms the query screen sequentially inputs the numbers that correspond to the image password, i.e., the fixed key of the user himself or herself, and a result of user authentication is processed according to whether the inputted numbers are matched to the response value prepared in a server.

Abstract: The present invention relates to safe authentication. According to the present invention, a security access service method includes an authentication step by the input of text, an access location tracking step, an authentication step by the input of coordinates, and an access history report step.