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:
Feb. 19, 2008
Filed:
Apr. 17, 2003
Stephan Courcambeck, Saint Cyr sur Mer, FR;
Claude Anguille, Aix en Provence, FR;
Stephan Courcambeck, Saint Cyr sur Mer, FR;
Claude Anguille, Aix en Provence, FR;
STMicroelectronics S.A., Montrouge, FR;
Abstract
A method of cyphering, by an integrated processor, of a set of data to be stored in a memory, including performing, in a continuous operation following a data flow, the steps of dividing the data flow into blocks of predetermined size and, for each block: generating a cyphering key using a pseudo-random generator implementing a continuous algorithm of cyphering according to a key specific to the integrated circuit and of an initialization vector changing for each block; combining the data block and the corresponding key in a continuous operation; and storing in the memory each cyphered block and the initialization vector used to cypher it.