Tamper detection using bulk multiple scattering

Details Tamper detection using bulk multiple scattering Tamper detection using bulk multiple scattering

1996-08-01

1998-08-04

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340557, 340553, 340555, 340568, 342 28, 250221, G08B 1314

Patent

active

057900256

ABSTRACT:
The multiple scattering of coherent radiation in an inhomogeneous medium is used to detect attempted intrusions into a protected area or into a tamper-proof package for such purposes as preventing the unauthorized detection and copying of electronic information used for authentication and coding in electronic commerce, communications, command, and control systems. A key advantage is that any intrusion into the sensed volume will produce a detected change in the measured intensity which will be equal to the full amplitude range if the intrusion is into a cylinder with radius comparable to the wavelength of the sensing radiation. The response of the medium can also be used to provide a unique identity key.

REFERENCES:
patent: 3683352 (1972-08-01), West et al.
patent: 4367458 (1983-01-01), Hackett
patent: 4367460 (1983-01-01), Hodara
patent: 4710627 (1987-12-01), Baltes et al.
patent: 4760381 (1988-07-01), Haag
patent: 4935723 (1990-06-01), Vallance
patent: 4952939 (1990-08-01), Seed
patent: 5365218 (1994-11-01), Otto

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