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:
Oct. 28, 1997
Filed:
Aug. 29, 1995
Applicant:
Inventor:
Francois Geronimi, Aix en Provence, FR;
Assignee:
Gemplus Card International, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235492 ; 380-4 ;
Abstract
A smart card and method of locking a smart card to block the operation of at least one protected program stored in a read-only memory or ROM of the smart card, the smart card incorporating a central processor, the ROM, an erasable programmable read-only memory or EPROM and a random access memory or RAM, the method comprising the steps of: entering a logic lock in the EPROM, making multiple copies of the logic lock in the EPROM, and carrying out a logic OR on the logic lock and the multiple copies in order to block the performance of the protected program upon the detection of either (a) the logic lock or (b) at least one of the multiple copies.