| 摘要 |
A system for providing tamper detection includes a plurality of circuit cards in a housing. The housing includes magnetic sensors and magnetic signal generators that form multiple pairs of a magnetic sensor (S) coupled to a magnetic signal generator (M). Each pair of S and M forms a tamper detector for a respective circuit card in the housing. A tamper detector of one circuit card notifies another tamper detector of another circuit card of the occurrence of a tamper event. As an example, a first tamper detector of a first circuit card notifies a second circuit card of the occurrence of a tamper event, and a second tamper detector of the second circuit card notifies a third circuit card of the occurrence of the tamper event. The first tamper detector is configured to sense a change in a magnetic field surrounding the first circuit card and generate a magnetic pulse for transmission to the second circuit card. The second tamper detector is configured to sense a change in a magnetic field surrounding the second circuit card and generate a magnetic pulse for transmission to the third circuit card.
|
