The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2005
Filed:
Sep. 21, 2000
Douglas A. Clark, Wallingford, CT (US);
Douglas A. Clark, Wallingford, CT (US);
Pitney Bowes Inc., Stamford, CT (US);
Abstract
A tamper detection system includes a trigger mechanism system and a detection circuit that operate in combination to protect an integrated circuit from attack. The detection circuit connects to the trigger mechanism system that is basically a protective mesh that consists of two separate loops of wire held in close proximity to each other and an optional ground layer. The mesh is such that an attempted penetration is highly likely to cause an open of either loop or a short of one loop to the other. The detection system recognizes shorts and opens in the mesh. The detection circuit is intended to be very simple in its operation it that it does not require a sophisticated stimulus and response set to operate. It is designed to be polled on a regular basis for indications of a change in its operation.