Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2005-07-06
2010-10-05
Vu, Kimyen (Department: 2435)
Cryptography
Communication system using cryptography
Symmetric key cryptography
C380S037000
Reexamination Certificate
active
07809141
ABSTRACT:
A method and an element for ciphering with an integrated processor data to be stored in a memory, including applying to each data block to be ciphered a ciphering algorithm which is a function of at least one key specific to the integrated circuit, and before applying the ciphering algorithm thereto, combining the data block to be ciphered with the result of a function of the storage address of the ciphered block in the memory, and/or of combining the key with the result of a function of the storage address of the ciphered block in the memory and of a digital quantity different from the ciphering key.
REFERENCES:
patent: 4149035 (1979-04-01), Frutiger
patent: 4278837 (1981-07-01), Best
patent: 4319079 (1982-03-01), Best
patent: 4465901 (1984-08-01), Best
patent: 6021201 (2000-02-01), Bakhle et al.
patent: 6061449 (2000-05-01), Candelore et al.
patent: 7472285 (2008-12-01), Graunke et al.
patent: 2003/0198344 (2003-10-01), Courcambeck et al.
patent: 2004/0028224 (2004-02-01), Liardet et al.
patent: 2004/0136529 (2004-07-01), Rhelimi et al.
patent: 2006/0253708 (2006-11-01), Bardouillet et al.
French Search Report from French Patent Application No. 04/51458, filed Jul. 6, 2004.
Bertoni Guido Marco
Daemen Joan
Van Assche Gilles
Jorgenson Lisa K.
King John B
McClellan William R.
Proton World International N.V.
STMicroelectroics S.r.l.
LandOfFree
Ciphering by blocks of the content of a memory external to a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ciphering by blocks of the content of a memory external to a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ciphering by blocks of the content of a memory external to a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4179004