Use of generic (browser) encryption API to do key exchange (for media files and player)

• US 9,697,366 B1
• Filed: 03/06/2015
• Issued: 07/04/2017
• Est. Priority Date: 12/12/2011
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google Inc. (Alphabet Inc.)
• Inventors: Dorwin, David Kimbal, Sleevi, Ryan David, Scherkus, Andrew Martin
• Primary Examiner(s): Williams, Jeffery
• Application Number:
  US14/640,611
• Time in Patent Office: 851 Days
• Field of Search: None
• CPC Class Codes: G06F 11/3003 Monitoring arrangements specially adapted to the computing system or computing system component being monitored
• CPC Class Codes: G06F 21/105 Arrangements for software license management or administration, e.g. for managing licenses at corporate level
• CPC Class Codes: G06F 21/1062 Editing
• CPC Class Codes: G06F 21/1073 Conversion
• CPC Class Codes: G06F 21/50 Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
• CPC Class Codes: G06F 21/60 Protecting data
• CPC Class Codes: G06F 21/602 Providing cryptographic facilities or services
• CPC Class Codes: G06F 21/62 Protecting access to data via a platform, e.g. using keys or access control rules
• CPC Class Codes: G06F 21/6209 to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
• CPC Class Codes: G06F 40/143 Markup, e.g. Standard Generalized Markup Language [SGML] or Document Type Definition [DTD]
• CPC Class Codes: G06T 11/00 2D [Two Dimensional] image generation
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 2463/103 applying security measure for protecting copy right protecting software against unauthorised usage in a vending or licensing environment, e.g. protection the software providers copyright G06F21/10; data processing systems or methods, specially adapted for payment schemes, architectures or protocols G06Q20/00; secrecy systems or subscription systems H04N7/16
• CPC Class Codes: H04L 47/801 Real time traffic
• CPC Class Codes: H04L 47/805 QOS or priority aware
• CPC Class Codes: H04L 63/00 Network architectures or network communication protocols for network security cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00; network architectures or network communication protocols for wireless network security H04W12/00; security arrangements for protecting computers or computer systems against unauthorised activity G06F21/00
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/0876 : based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
• CPC Class Codes: H04L 63/102 : Entity profiles
• CPC Class Codes: H04L 65/1101 : Session protocols
• CPC Class Codes: H04L 65/1108 : Web based protocols, e.g. webRTC
• CPC Class Codes: H04L 65/613 : for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 65/762 : at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 65/80 : Responding to QoS
• CPC Class Codes: H04L 9/0631 : Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
• CPC Class Codes: H04L 9/0861 : Generation of secret information including derivation or calculation of cryptographic keys or passwords
• CPC Class Codes: H04L 9/32 : including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
• CPC Class Codes: H04N 21/2347 : involving video stream encryption
• CPC Class Codes: H04N 21/24 : Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests monitoring of server performance or load G06F11/34; arrangements for observation, testing or troubleshooting for broadcast or for distribution combined with broadcast H04H20/12
• CPC Class Codes: H04N 21/25825 : involving client display capabilities, e.g. screen resolution of a mobile phone optimising the visualisation of content during browsing in the Internet G06F16/9577; processing of terminal status or physical abilities in wireless networks H04W8/22; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/25833 : involving client hardware characteristics, e.g. manufacturer, processing or storage capabilities allocation of resources considering hardware capabilities in multiprogramming arrangements G06F9/5044; allocation of resources considering software capabilities in multiprogramming arrangements G06F9/5055
• CPC Class Codes: H04N 21/41407 : embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4405 : involving video stream decryption
• CPC Class Codes: H04N 21/4516 : involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available

Abstract

Embodiments are directed towards decrypting encrypted content. A key for decrypting the encrypted content may be provided to a web application executing within a browser. The application may employ a generic cryptography application program interface (GCAPI) to perform actions on the key, including, storing the key, decrypting an encrypted key, generating another key, converting the key to a different encryption type, or the like. The GCAPI may or may not be enabled to explicitly share the key with the browser'"'"'s media engine. In response to receiving encrypted content, the GCAPI may provide the key to the application, explicitly or inexplicitly to the browser'"'"'s media engine, or the like. The key may be utilized by the application, the browser, the media element, browser'"'"'s media engine, and/or the GCAPI to decrypt the encrypted content. The decrypted content may be displayed within the browser to a user of a client device.

Claims

1. A method for managing content, the method comprising:

providing, using a hardware processor, a key to a web-based application that operates on a browser application;

performing an action on the key using a generic cryptography application program interface (GCAPI) that is associated with the browser application;

providing encrypted content to the web-based application;

providing an indication of the key to a second application program interface associated with a media element supported by the web-based application, wherein the media element is a component of a markup language for displaying a web page in the browser application;

decrypting the encrypted content using the second application program interface associated with the media element supported by the web-based application and based on the key; and

causing the decrypted content to be presented by the web-based application by providing a reference to the decrypted content to the media element.

2. The method of claim 1, wherein the key is an encrypted key and wherein the action performed on the key using the GCAPI is decrypting the encrypted key based on a platform key that corresponds to a device executing the browser application.

3. The method of claim 2, further comprising:

determining whether the key is associated with one or more encryption types supported by the browser application; and

in response to determining that the key is not associated with the one or more encryption types supported by the browser application, generating a second key based on the key that is associated with the one or more encryption types supported by the browser application.

4. The method of claim 1, wherein encrypted content is provided based on the media element of the markup language that is supported by the browser application.

5. The method of claim 1, further comprising providing a portion of the encrypted content to the GCAPI to decrypt the encrypted content, wherein the portion of the encrypted content has been determined based on one or more properties of the encrypted content.

6. The method of claim 1, wherein the action performed on the key further comprises:

generating a second key based on the key;

associating the second key with the media element;

obtaining a current key stored by the GCAPI, wherein the current key is the second key; and

in response to a key request based on the media element, using the GCAPI to transmit the second key to the browser application.

7. The method of claim 1, further comprising:

determining that a key identifier is associated with the encrypted content;

obtaining, using the GCAPI, a second key from a key store based on the key identifier; and

decrypting the encrypted content based on the media element supported by the web-based application and based on the second key.

8. The method of claim 1, further comprising:

causing the GCAPI to provide the reference to the decrypted content to the media element.

9. A system for managing content, the system comprising:

a hardware processor that is configured to;

provide a key to a web-based application that operates on a browser application;

perform an action on the key using a generic cryptography application program interface (GCAPI) that is associated with the browser application;

provide encrypted content to the web-based application;

provide an indication of the key to a second application program interface associated with a media element supported by the web-based application, wherein the media element is a component of a markup language for displaying a web page in the browser application;

decrypt the encrypted content using the second application program interface associated with the media element supported by the web-based application and based on the key; and

cause the decrypted content to be presented by the web-based application by providing a reference to the decrypted content to the media element.

10. The system of claim 9, wherein the key is an encrypted key and wherein the action performed on the key using the GCAPI is decrypting the encrypted key based on a platform key that corresponds to a device executing the browser application.

11. The system of claim 10, wherein the hardware processor is further configured to:

determining whether the key is associated with one or more encryption types supported by the browser application; and

in response to determining that the key is not associated with the one or more encryption types supported by the browser application, generating a second key based on the key that is associated with the one or more encryption types supported by the browser application.

12. The system of claim 9, wherein encrypted content is provided based on the media element of the markup language that is supported by the browser application.

13. The system of claim 9, wherein the hardware processor is further configured to provide a portion of the encrypted content to the GCAPI to decrypt the encrypted content, wherein the portion of the encrypted content has been determined based on one or more properties of the encrypted content.

14. The system of claim 9, wherein the hardware processor is further configured to:

generate a second key based on the key;

associate the second key with the media element;

obtain a current key stored by the GCAPI, wherein the current key is the second key; and

in response to a key request based on the media element, use the GCAPI to transmit the second key to the browser application.

15. The system of claim 9, wherein the hardware processor is further configured to:

determine that a key identifier is associated with the encrypted content;

obtain, using the GCAPI, a second key from a key store based on the key identifier; and

decrypt the encrypted content based on the media element supported by the web-based application and based on the second key.

16. The system of claim 9, wherein the hardware processor is further configured to:

cause the GCAPI to provide the reference to the decrypted content to the media element.