A compact authentication system for applications of two-dimensional code in mobile commerce*

Two-dimensional code has been widely used in mobile commerce. With the information contained in the code, a purchase always happened. For mobile user, the convenience and security is important. This paper analyzed the shortages of S/KEY OTP system in mobile commerce identity authentication and suggested an improved one-time password system based on bidirectional virtual authorization in mobile application systems. From the results of simulation, the new system has more convenience and security than the original one.