Touchless PIN input method and touchless PIN input system

摘要

PROBLEM TO BE SOLVED: To provide a PIN input method in which a customer does not touch a keypad with a finger when inputting a PIN code. SOLUTION: When a personal identification number (PIN) is input by a self-service terminal such as an automated teller machine, a communication channel is established between a specific customer's mobile device and the self-service terminal, and a PIN input application is used. , Validate the public key contained in the CA digital certificate sent from the self-service terminal to the mobile device. The PIN input application encrypts the customer's PIN using a temporary symmetric encryption key and the temporary symmetric encryption key using a public key. The encrypted PIN and the encrypted temporary symmetric encryption key are transmitted from the mobile device to the encryption processor of the self-service terminal. The encryption processor decrypts the PIN with the decrypted temporary symmetric encryption key. [Selection diagram] Fig. 3