Patent · US Expired

Method and device for protecting integrated circuits against piracy

US7146509B2 · kind B2 · utility

6Cited by

44References

15Claims

0Family size

Assignee

STMicroelectronics SA

Inventors

Fabrice Marinet · Gardanne, FR
Sylvie Wuidart · Saint-Maximin-la-Sainte-Baume, FR

Key dates

Filing date	Nov 1, 2001
Grant date	Dec 5, 2006
Priority date	—
Expiry date	Nov 5, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG06F2221/2143
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Before a predetermined processing sequence, the integrated circuit detects the state of at least one timer. The circuit controls the activation of the timer if it is not activated, and disables itself if the timer is activated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.