Tamper monitoring system and method
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United States of America Patent
Stats
-
Dec 30, 2008
Grant Date -
Nov 23, 2006
app pub date -
Apr 26, 2006
filing date -
Apr 26, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tamper monitoring system includes at least one active tag and a transmission link. The one active tag includes a transmitter and a receiver. The first end of the transmission link is connected to the transmitter and the second end is connected to the receiver. The transmitter is designed to transmit a non-constant signal to the transmission link to the receiver, and the receiver is designed to receive a signal from the transmission link and to correlate the received signal with the transmitted signal. When the received signal does not correlate with the transmitted signal, the active tag transmits a tamper beacon.
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