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:
May. 30, 2006
Filed:
Sep. 29, 2003
Pierre Chavanne, Davis, CA (US);
John Hwa, Fremont, CA (US);
Lakshmana Pamarthy, Santa Clara, CA (US);
Carl Quinn, San Jose, CA (US);
Ralph Hill, Los Gatos, CA (US);
Eric Swenson, Soquel, CA (US);
Motomasa Futagami, Sunnyvale, CA (US);
Atsushi Mituszawa, Kanagawa, JP;
Pierre Chavanne, Davis, CA (US);
John Hwa, Fremont, CA (US);
Lakshmana Pamarthy, Santa Clara, CA (US);
Carl Quinn, San Jose, CA (US);
Ralph Hill, Los Gatos, CA (US);
Eric Swenson, Soquel, CA (US);
Motomasa Futagami, Sunnyvale, CA (US);
Atsushi Mituszawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Sony Electronics Inc., Park Ridge, NJ (US);
Abstract
Protection of digital content using a specific application of block cipher cryptography is described. The digital content is encrypted using an encryption key and a calculated initialization vector. The digital content includes a plurality of strides of data and each stride includes a string of data to be encrypted and a block of data to be encrypted. The calculated initialization vector to be used to encrypt the block of data is derived from the string of data in the stride to be encrypted. Furthermore, the initialization vector is calculated by performing an exclusive disjunction function on a seed value and the string of data for each stride.