Browse Prior Art Database

Tampering Detector for Printed Circuit Cards

IP.com Disclosure Number: IPCOM000060696D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bundy, LE: AUTHOR [+3]

Abstract

In some applications requiring a high level of security, it is necessary to be able to detect whether a device is being or has been tampered with by unauthorized people. A simple self-contained inexpensive detection device for use with a pri circuit board consists of a conductive foil pattern (Fig. 1) mounted on a portion of the printed circuit board 2 (Fig. 2).

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Tampering Detector for Printed Circuit Cards

In some applications requiring a high level of security, it is necessary to be able to detect whether a device is being or has been tampered with by unauthorized people. A simple self-contained inexpensive detection device for use with a pri circuit board consists of a conductive foil pattern (Fig. 1) mounted on a portion of the printed circuit board 2 (Fig. 2).

The foil pattern 1 is located on the circuit board 2 at a place where a mounting screw 3 for the board is located. The screw 3 upon being tightened holds a conducting washer 4 against the foil pattern 1. Thus, when the circuit board 2 is secured, the foil pattern 1 in conjunction with the washer 4 and the screw 3 functions as a switch. Thus, when the circuit board 2 is removed, the switch is opened. While it is not shown, it is obvious the opening of the switch could initiate an alarm of some type to indicate that the board is being removed.

Disclosed anonymously.

1