(12) United States Patent (10) Patent No.: US 8,891,765 B1 Dorwin (45) Date of Patent: Nov

US008891765B1

(12) United States Patent (10) Patent No.: US 8,891,765 B1 DOrwin (45) Date of Patent: Nov. 18, 2014

(54) METHOD, MANUFACTURE, AND 5,067,035 A 11/1991 Kudelski et al. APPARATUS FOR CONTENT DECRYPTION 5,134,656. A 7/1992 Kudelski MODULE 5,144,663 A 9, 1992 Kudelski et al. 5, 191,611 A 3/1993 Lang r ar. 5,339,413 A 8, 1994 Koval et al. (71) Applicant: Google Inc., Mountain View, CA (US) 5,375,168 A 12/1994 Kudelski 5,392,351 A 2f1995 HaSebe et al. (72) Inventor: David Kimbal Dorwin, Kirkland, WA 5.487,167 A 1/1996 Dinallo et al. (US) (Continued) (73) Assignee: Google Inc., Mountain View, CA (US) FOREIGN PATENT DOCUMENTS (*) Notice: Subject to any disclaimer, the term of this EP O6.58054 A2 6, 1995 patent is extended or adjusted under 35 EP O714204 A2 5, 1996

(21) Appl. No.: 13/710,940 OTHER PUBLICATIONS 1-1. “A new approach to browser security: the Google Chrome Sandbox.” (22) Filed: Dec. 11, 2012 Chromium Blog. http://blog.chromium.org/2008/10/new-approach to-browser-Security-google.html, 5 pages, Oct. 2, 2008. Related U.S. Application Data (Continued) (60) Provisional application No. 61/569,755, filed on Dec. 12, 2011. Primary Examiner — Saleh Naijar Assistant Examiner — Oleg Korsak (51) Int. Clwe 74) Attorney,ttorney, Agent, or FiFirm — FenwickFenW1C & Westest LLP H04N 7/167 (2011.01) G06F2L/10 (2013.01) (57) ABSTRACT (52) U.S. Cl. A method, apparatus, and manufacture for a content decryp CPC ...... G06F 21/10 (2013.01) tiono modules (CDM) '.is provided.o A user agent loads a web USPC ...... 380/201: 713/156 application. The web application gets a license for encrypted (58) Field of Classification Search media content. The web application instructs a media stack of CPC ...... G06F 11/3672; G11B 20/0021; G11B the user agent to play the encrypted media content. The 20.OOO86 license is sent from the web application to the media stack. USPC ...... 380.201; 713/156 Next, the license is sent from the media stack to the CDM. The See application file for complete search history. media stack and the CDM are distinct binaries from each (56) References Cited other. Encrypted data is sent from the media stack to the CDM. The encrypted data includes at least a portion of the U.S. PATENT DOCUMENTS encrypted media content. Next, the CDM provides decrypted data by decrypting the encrypted data. 4,535,355 A 8, 1985 Arnet al. 4,694,489 A 9, 1987 Frederiksen 20 Claims, 7 Drawing Sheets - iii

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M. et al., “An Overview of Multimedia Content Pro Release, Sep. 27, 2002 http://www.ntt.co.jp/news/news02e/0209/ tection in Consumer Electronics Devices'. SP:IC, vol. 16 No. 7, Apr. 020927.html. 2001, pp. 681-699. "Getting Started: Background and Basics—The Chromium Ferrill, E. et al., “A Survey of Digital Watermarking”. Feb. 25, 1999, Projects.” http://chromium.org/nativeclient/getting-started/getting 15 pages http://elizabeth.ferrill.com/papers/watermarking.pdf. started-background-and-basics, 4 pages, Sep. 2, 2008. 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D. etal, “Digital Rights Management for Digital Cinema', Release, Optibase, Dec. 14, 2000, pp. 1-2 http://www.optibase.com/ Proceedings of the SPIE, Bellingham, VA, vol. 4472, Jul. 31, 2001, p. html/news/December 14 2000.html. 105-120. “Media Source Extensions, W3C Editor's Draft Dec. 18, 2012. Metz, C., “Google Native Client: The web of the future—or the http://dvcs.w3.org/hg/html-media/raw-fileftip/media-source/media past?” The Register, http://www.theregister.co.uk/2011/09/12/ Source.html, 25 pages, created Jul. 11, 2011, current draft dated Dec. google native client from all sidesprint.html, 13 pages, Sep. 18, 2012. 12, 2011. “Media Source Extensions.” http://html.5-mediasource-api. Office Action for European Patent Application No. 05250968.4 googlecode.com/Svn?trunk? draft-spec/mediaSource-draft-spec.html, mailed Jan. 26, 2006. 1 page, Jul. 11, 2011. Official Communication for Chinese Patent Application No. “MediaSource Extensions v0.3.” editor A. 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(56) References Cited Official Communication for U.S. Appl. No. 13/532,734 mailed Oct. 23, 2013. OTHER PUBLICATIONS Official Communication for U.S. Appl. No. 13/654.237 mailed Oct. 23, 2013. Search Report for European Patent Application No. 05250968.4 Official Communication for U.S. Appl. No. 13/654,271 mailed Oct. mailed Oct. 12, 2005. 24, 2013. Spanos, G. et al., “Performance Study of a Selective Encryption Official Communication for U.S. Appl. No. 13/712,764 mailed Nov. 7, 2013. Scheme for the Security of Networked, Real-Time Video', Proceed Supplementary European Search Report for European Patent Appli ings of the Fourth International Conference on Computer Commu cation No. 04757582.4 mailed Nov. 20, 2006. nications and Networks, ICCCN '95, Las Vegas, NV. Sep. 1995, pp. Teixeira, L. M. etal, “Secure Transmission of MPEGVideo Sources', 2-10. Proceedings of IEEE Workshop on ISPACS, Nov. 6, 1998, pp. 1-5. Supplementary European Search Report for European Patent Appli Wu, T.-L. et al., “Selective Encryption and Watermarking of MPEG cation No. 00986215 dated Nov. 14, 2005. Video (Extended Abstract). Submitted to International Conference Official Communication for U.S. Appl. No. 13/586,664 mailed Dec. on ImageScience, Systems, and Technology, Feb. 17, 1997, 10 pages. 26, 2013. Yee, B. et al., “Native Client: A Sandbox for Portable, Untrusted x86 Official Communication for U.S. Appl. No. 13/437,789 mailed Mar. Native Code.” IEEE Symposium on Security and Privacy, Oakland 26, 2013. 2009, 15 pages, May 16-19, 2009. Official Communication for U.S. Appl. No. 13/586,664, mailed Jun. Yoshida, K. et al., “A Continuous-Media Communication Method for 20, 2013. Minimizing Playback Interruptions”. IS&T/SPIE Conference on Official Communication for U.S. Appl. No. 13/437,789 mailed Aug. Visual Communications and Image Processing, San Jose, California, 14, 2013. vol. 3653, Jan. 1999, 10 pages. Colwell, A., “Proposal for a MediaSource API that allows sending Zhang, J. et al., “A Flexible Content Protection System for Media media data to a HTMLMediaElement.” Jul. 11, 2011, pp. 1-11 http:// On-Demand”. Proceedings of the Fourth International Symposium lists.whatwg.org/pipermail/whatwg-whatwg.org/2011-July/ on Multimedia Software Engineering 2002, Dec. 11-13, 2002, 032384.html. Piscataway, NJ, Dec. 11, 2002, pp. 272-277. Official Communication for U.S. Appl. No. 13/437,789 mailed Nov. 13, 2013. * cited by examiner U.S. Patent Nov. 18, 2014 Sheet 1 of 7 US 8,891,765 B1

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R. &: if y . . . . -r / US 8,891,765 B1 1. 2 METHOD, MANUFACTURE, AND intended to be limiting and merely set forth some of the many APPARATUS FOR CONTENT DECRYPTION possible embodiments for the claimed invention. MODULE Throughout the specification and claims, the following terms take at least the meanings explicitly associated herein, CROSS-REFERENCE TO RELATED unless the context dictates otherwise. The meanings identi APPLICATION fied below do not necessarily limit the terms, but merely provide illustrative examples for the terms. The meaning of This application is a utility patent application based on “a,” “an and “the includes plural reference, and the mean previously filed U.S. Provisional Patent Application Ser. No. ing of “in” includes “in” and “on.” The phrase “in one 10 embodiment, as used herein does not necessarily refer to the 61/569,755 filed on Dec. 12, 2011, the benefit of which is same embodiment, although it may. Similarly, the phrase “in hereby claimed under 35 U.S.C. S 119(e) and incorporated Some embodiments, as used herein, when used multiple herein by reference. times, does not necessarily refer to the same embodiments, TECHNICAL FIELD although it may. As used herein, the term 'or' is an inclusive 15 “or operator, and is equivalent to the term “and/or unless the context clearly dictates otherwise. The term “based, in The invention is related to computer Software, and in par part, on”, “based, at least in part, on', or “based on is not ticular, but not exclusively, to a method, manufacture, and exclusive and allows for being based on additional factors not apparatus for providing a content protection module (CDM) described, unless the context clearly dictates otherwise. The that is a distinct binary from a client browser where the CDM term “coupled means at least either a direct electrical con performs decryption for the client browser. nection between the items connected, or an indirect connec tion through one or more passive or active intermediary BACKGROUND devices. The term “signal” means at least one current, Volt age, charge, temperature, data, or other signal. Today, HyperText Markup Language 5 (HTML5) media 25 Briefly stated, the invention is related to a method, appa tags, such as

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