| 摘要 |
A method and system for affording security to a mobile phone (1) or other mobile device 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 by the device-user. 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 (1) 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. |
