| 摘要 |
PROBLEM TO BE SOLVED: To strengthen security against information leakage while suppressing costs.SOLUTION: A conversion unit 8 of a server 3 converts a card number from a computer device 2 into a token that is a random number and returns the token to the computer device 2. The token includes a number that can identify the computer device 2 that is the source of transmission or a vendor requesting the settlement of accounts using the computer device 2. When a request for settlement of accounts and the token are transmitted, an inverse conversion unit 9 returns the token to the card number from which it was converted. A settlement processing unit 10 processes the settlement of accounts using the card number in accordance with the request for settlement of accounts. The acquisition unit 5 of the computer device 2 acquires a token corresponding to the card number by transmitting the card number to the server 3. A processing unit 6, which holds only the token among the card number and token, executes a process that utilizes the card number by using the token as the card number in place of the card number. |
