| 摘要 |
A method and system for affording security to a mobile phone (1) or other mobile device that involves checks by the device (1) on reception of a code transmitted repeatedly to it from a transmitter unit (8) of a transponder (7) that is interrogated by the device (1) and carried nearby the device-user. The absence of reception of the code by the device (1) resulting from theft or other loss separating it out of range from the transponder (7), together with detection of device-movement results in an alarm which if, not acted on causes, the device (91) to enter a lock-down mode in which it cannot be turned off without entry of a correct password or other person-identifier. In this mode, operation of the device is restricted to transponder-interrogation, GPS or other tracking, and server communication via the internet (3) enabling its location to be determined. |
