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1. (WO2018125849) DECRYPTION AND VARIANT PROCESSING

Pub. No.:    WO/2018/125849    International Application No.:    PCT/US2017/068374
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sun Dec 24 00:59:59 CET 2017
IPC: G06F 21/72
H04N 19/00
G06F 9/46
H04N 21/00
Applicants: WESTERN DIGITAL TECHNOLOGIES, INC.
Inventors: BLANKENBECKLER, David
KOLAROVIC, Nikola
ZMUKIC, Ninoslav
ANDJELIC, Tihomir
Title: DECRYPTION AND VARIANT PROCESSING
Abstract:
A plurality of byte ranges including at least one encrypted byte range forms a variant sample for providing a digital watermark in content output by a player device. The plurality of byte ranges is ordered in secured memory, and stored in unsecured memory including one or more encrypted byte ranges for further processing of the ordered plurality of byte ranges. In another aspect, a plurality of byte ranges forms a sample for content output from a player device, and includes at least one double-encrypted byte range. The plurality of byte ranges is stored in secured memory, and the at least one double-encrypted byte range is partially decrypted to generate at least one decrypted singe-encrypted byte range. The plurality of byte ranges is stored in unsecured memory using the at least one decrypted single-encrypted byte range in place of the at least one double-encrypted byte range.