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. 17, 2015
Filed:
Oct. 31, 2011
Augustin J. Farrugia, Cupertino, CA (US);
Benoit Chevallier-mames, Paris, FR;
Bruno Kindarji, Paris, FR;
Mathieu Ciet, Paris, FR;
Thomas Icart, Paris, FR;
Augustin J. Farrugia, Cupertino, CA (US);
Benoit Chevallier-Mames, Paris, FR;
Bruno Kindarji, Paris, FR;
Mathieu Ciet, Paris, FR;
Thomas Icart, Paris, FR;
Apple Inc., Cupertino, CA (US);
Abstract
In the field of computer enabled cryptography, such as a cipher using lookup tables, the cipher is hardened against an attack by a protection process which obscures the lookup tables using the properties of bijective functions and applying masks to the tables' input and output values, for encryption or decryption. This is especially advantageous in a 'White Box' environment where an attacker has full access to the cipher algorithm, including the algorithm's internal state during its execution. This method and the associated computing apparatus are useful for protection against known attacks on 'White Box' ciphers, by obfuscating lookup table data, thereby increasing the cipher's complexity against reverse engineering and other attacks.