US Patent 9182967 Method for safely downloading application

A method for safely downloading an application, including: after a successful mutual authentication of a card and a card connector, adopting an all-cipher text communication means, and controlling the number of installations of an application by a card activation operation, so as to realize secure downloading of the application. The present invention realizes all-cipher text communication of a card and a card connector, and the issuing frequency of the card is controllable; by means of such a method, the independence and security of the application can be ensured when issuing a card, while the issuing frequency of the card is limited, intermediaries and clients are prevented from arbitrarily downloading an application, and the security is relatively high.