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:
Dec. 30, 2003
Filed:
Jun. 26, 2000
Louis-Pierre Saphar, Toulon, FR;
Thierry Karlisch, La Ciotat, FR;
Gemplus, Gemenos, FR;
Abstract
Smart card readers dedicated to a particular application use both a microcontroller whose read only memory determines the running of the application, and a security component executing, under the control of the microcontroller, subroutines related to the security of the application (authentication, confidential programs, etc.). So that the manager of the application can have access to certain memory areas of the security component, provision is made for the microcontroller to be able to pass automatically to a so-called “transparent” mode, when a specific access code issued by a test card is recognized. In this mode, the read or write instructions for a memory area, issued by the test card, are interpreted by the microcontroller as being read or write instructions for a memory area of the security component rather than the microcontroller.