| 摘要 |
A client device is coupled with a server. The client device prompts a user to enter a number associated with a mobile device, which can be the client device, and generates data including a code. The code is typically hidden from the user when the code is generated and is saved on the client device. The client device transmits the number entered by the user and the code generated by the client device to the server, which sends a message, including the code, to the mobile device associated with the number. The client device prompts the user to enter the code included in the message. Validity of the number is based on one or more factors, including the accuracy of the code entered by the user. In addition, validity of the number can also be based on whether the second user input was entered within a predetermined time limit. |
