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:
Aug. 05, 2014
Filed:
Mar. 19, 2012
Sylvain Pasini, Renens, CH;
Jean-philippe Aumasson, Vuibroye, CH;
Sylvain Pasini, Renens, CH;
Jean-Philippe Aumasson, Vuibroye, CH;
Nagravision S.A., Cheseaux-sur-Lausanne, CH;
Abstract
An encryption method is disclosed, including two passes over a sequence of N input digital data X, . . . Xblocks where the first pass executes iterative linear algebraic operations from the last input block Xto the first input block Xto obtain a sequence of intermediary resulting Y. . . Yblocks. The second pass executes a block ciphering in a chaining mode from the first intermediary resulting Yblock to the last one Yto obtain a sequence of encrypted output Z. . . Zblocks. The decryption is carried out only in one pass from the first input encrypted Zblock to the last input encrypted block Z. The deciphering operations are executed in an iterative loop of inverse linear algebraic operations after deciphering the first input encrypted Zblock to obtain an output sequence of decrypted X, . . . Xblocks.