Granted Patent B2

US 12,355,736 · App. 18/526,982 · Granted Jul 8, 2025

Inventors: Eric William Grab (San Diego, CA); Kourosh Soroushian (San Diego, CA); Tung Lin (San Diego, CA); Francis Yee-Dug Chan (San Diego, CA); Evan Wallin (San Diego, CA); William David Amidei (San Diego, CA)

Assignee: DIVX, LLC

H04L63/0428G06F21/10G06F21/12H04L63/06H04L63/0876H04L63/0884H04L63/168H04L67/60

Abstract

Claims (26)

1. A method for requesting and playing back video media content, the method comprising:

communicating communication data comprising an application identifier to a playback device, where the application identifier is a unique character string that identifies a video playback application on the playback device and remains static throughout all instances where the application is deployed;

where the playback device stores a plurality of client applications, and each client application has an associated application name, application version, and application identifier;

starting a client application, of the plurality of client applications, that is identified by the application identifier received within the communication data by the playback device;

requesting and receiving portions of video content from a content server by the playback device as instructed by the identified client application; and

playing back the received portions of video content by the playback device.

2. The method of claim 1 , further comprising:

retrieving a product identifier stored in a memory of the user device, where the product identifier is associated with the execution platform of the user device.

3. The method of claim 1 , further comprising:

receiving a request for access to a shared library on the playback device;

verifying the shared library on the playback device using a library manifest containing information that can be used to identify and verify the shared library, wherein the library manifest contains at least one hash value of the shared library, and wherein verifying the shared library comprises taking a hash value of the shared library and comparing the hash value against the at least one hash value contained in the manifest;

negotiating a session token key with the shared library using the playback device; and

providing a session token encrypted with the session token key to the application using the user device, wherein the session token key grants access to the shared library.

4. The method of claim 3 , wherein the library manifest contains at least one private key signature.

5. The method of claim 3 , wherein the library manifest contains a private key signature of the contents of the manifest.

6. The method of claim 3 , wherein negotiating a session token key comprises:

sending a request to the shared library using the playback device;

receiving data encrypted with a session manager's public key using the user device;

sending data encrypted with the shared library's public key to the shared library using the user device; and

receiving confirmation from the shared library using the user device.

7. The method of claim 6 , further comprising retrieving a product identifier stored in a memory of the user device, where the product identifier is associated with the execution platform of the user device.

8. The method of claim 1 , wherein a session manager is statically compiled into the application.

9. The method of claim 1 , wherein a session manager and shared libraries are part of a common application platform stored in a memory of the user device.

10. The method of claim 1 , further comprising determining whether a software library is compatible with a particular application using an application identifier of the application.

11. The method of claim 1 , wherein the communication data is communicated over a secure connection using secure sockets layer (SSL).

12. The method of claim 1 , wherein playing back the received portions of video content by the user device further comprises authenticating a shared library using a library manifest.

Assignments (4)

Continuity (8)

References Cited (348)