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:
Feb. 07, 2017
Filed:
Jun. 10, 2015
Nagravision SA, Cheseaux-sur-Lausanne, CH;
NAGRAVISION S.A., Cheseaux-sur-Lausanne, CH;
Abstract
A system and method for securely loading data in a cache memory associated with at least one secure processor that performs data processing by using at least one untrusted external memory storing data to be processed, at least one secure internal cache memory to load or store data, and at least one secure cache translator operating as a memory management unit. The secure cache translator stores, into a secure cache digest table, parameters arranged on persistent and variable data pages. The parameters comprise at least a root digest based on node digests calculated on at least one persistent data page according to a Merkle tree structure. The integrity of the data pages is verified during transfers between the secure internal cache memory and the external memory by comparing a calculated root digest with the root digest stored in the secure cache digest table.