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Computer Physical Security System - Memory Component Erasure/Damage Device Disclosure Number: IPCOM000034380D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27

Publishing Venue


Related People

Wittmann, EG Zarger, CA [+details]


The use of piezoelectric sensors is shown as a means of securing a computer system by utilizing sensor outputs to trigger memory erasure or to damage components. To protect proprietary hardware and software, a security system is shown which consists of piezoelectric sensors, random-access memory (RAM) devices, electrically erasable programmable read-only memory (EEPROM) devices, and interface circuitry. The voltage produced by piezoelectric sensors is used as a means to either trigger an erase function or damage components. The sensors utilize polyvinylidene fluoride piezoelectric plastic film. In various configurations, the approximately .001-inch-thick plastic detects changes (transients) in pressure, heat, displacement, strain, or acoustics and results in voltage output signals. Output levels are typically .25 to 3.