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. 30, 2012
Filed:
Nov. 02, 2006
Antonius Johannes Petrus Maria Van DE Ven, Schiedam, NL;
Antonius Johannes Petrus Maria Van De Ven, Schiedam, NL;
Irdeto Access B.V., , NL;
Abstract
A method of scrambling a stream of data includes obtaining from the stream a succession of first sequences of blocks of data. The order of the blocks is reversed in each of the first sequences of blocks to form respective second sequences of blocks of data. The blocks in each second sequence of blocks are encrypted using a cipher in block chaining mode, initialized with a respective initialization vector for each second sequence of blocks. For a succession of first sequences of blocks included in a unit of data within the stream, at least one initialization vector for encrypting a second sequence of blocks formed from a first sequence of blocks in the unit is generated in dependence on at least one block in a preceding first sequence of blocks of the unit.