| 摘要 |
PROBLEM TO BE SOLVED: To securely confirm whether age conditions are met for service requiring identification. SOLUTION: A server machine sends a message prompting the input of at least a credit card number and its password code to a client machine which is connected through a communication line, information regarding the credit card number and its password code which are inputted from the client machine and transferred through the communication line is transferred to a computer at the issuing source of the credit card, and according to the verification result of the password code by the computer, it is confirmed whether the user of the client machine is above the age of 18. |
