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:
Nov. 06, 2012
Filed:
Jan. 08, 2008
Wilhelmus Petrus Adrianus Johannes Michiels, Eindhoven, NL;
Paulus Mathias Hubertus Merchtildis Antonius Gorissen, Eindhoven, NL;
Hendrik Dirk Lodewijk Hollmann, Eindhoven, NL;
Wilhelmus Petrus Adrianus Johannes Michiels, Eindhoven, NL;
Paulus Mathias Hubertus Merchtildis Antonius Gorissen, Eindhoven, NL;
Hendrik Dirk Lodewijk Hollmann, Eindhoven, NL;
Irdeto B.V., , NL;
Abstract
A method and system is provided facilitating tracing copies of an implementation of a computational method where different versions of a network of look-up tables representing steps of the computational method are generated, and stored in a memory, each version being unique so that output encodings and/or input decodings of the white-box implementations of the computational method are different in the different versions. The network is formed by using an output value of a first look-up table as an input value of a second look-up table. The different versions are generated by changing at least one value in the network, end results of the version corresponding to a relevant domain of input values being substantially the same for each version. A method and system for computation for a user with the corresponding version in the memory, and/or for identifying a copy of an implementation of the computational method is provided.