Tamper detection and prevention for an object control and tracking system
Tamper detection and prevention for an object control and tracking system and particularly a Key Track system is provided. Where objects being tracked are keys, a key card having a touch memory device, RF id tag, or other circuitry for storing and transmitting an ID to a controller is provided. A tether attaches a key to the card. In one embodiment, the tether is conductive and the transmission of the ID code passes through the tether. If the tether is cut, transmission is interrupted to indicate a tampering condition. In another embodiment, the tether is resistive and circuitry is provided to monitor a voltage drop across the tether. A change in the voltage drop indicates a tampering condition. An object of the invention is to detect an attempt to remove the key (or other object) from its ID card while leaving the card intact.
1. A key tag comprising a body, a tether on said body for attachment of a key to said key tag, an electronic storage device in said body storing a transmittable identification code, and circuitry coupling said electronic storage device to said tether such that said identification code is transmittable through said tether, a severing of said tether causing a cessation of identification code transmission as an indication of a tampered with condition.
2. A key tag as claimed in claim 1 and further comprising a shroud on said tether for covering at least a portion of a key attached to said tether to protect the key from being cut and removed from said tether.
3. A key tag as claimed in claim 1 and wherein said electronic storage device is a touch memory device.
4. A key tag as claimed in claim 3 and wherein said touch memory device is a Dallas touch memory button.
5. A key tag as claimed in claim 3 and wherein said touch memory device is a memory chip housed in said body and further comprising conductors on said body for electrically accessing said memory chip.