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Personal Computer Module Assembly Physical Security - Embedded-Circuit Switch

IP.com Disclosure Number: IPCOM000036113D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Zarger, CA: AUTHOR

Abstract

Current interest in computer security is very high, particularly with respect to personal computers (PCs). The value of proprietary hardware and software makes personal computers prime targets for theft or competitive analysis. Further, the use of personal computers for cryptographic work also increases the security sensitivity of personal computers and the hardware held within them. This invention provides a simple switch design, to be used in conjunction with a personal computer module assembly sheath, which eliminates the security vulnerability of conventional personal computers and modules.

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Personal Computer Module Assembly Physical Security - Embedded- Circuit Switch

Current interest in computer security is very high, particularly with respect to personal computers (PCs). The value of proprietary hardware and software makes personal computers prime targets for theft or competitive analysis. Further, the use of personal computers for cryptographic work also increases the security sensitivity of personal computers and the hardware held within them. This invention provides a simple switch design, to be used in conjunction with a personal computer module assembly sheath, which eliminates the security vulnerability of conventional personal computers and modules.

Fig. 1 shows a small plastic switch 10, approximately .5 x .5 x .1 inch, with contacts on one end which can be soldered into a circuit board. The contacts connect the circuit board to other contact pads on the face of the switch. Connection is made via circuit lines embedded in the plastic. The contacts on the face of the switch, when shorted together, complete the circuit.

The switch 10 is intended for PC module assemblies which have a sheath 12 encasing the circuit board, as shown in Fig. 2. Circuitry 14 is mounted in the sheath within groove 16 formed into the sheath 12. Retainer tabs 18 and 20 in the disable switch secure the formed circuitry 14 to the groove 16. Alternatively, adhesives or fasteners could be used. The formed circuitry 14 could be fabricated with a variety of methods, such a...