IP Library Granted Patent US 11,681,781
Granted Patent B2
US 11,681,781 · App. 15/901,491 · Granted Jun 20, 2023

Systems and methods for content security

Inventor: Kyong Park (Philadelphia, PA)
Assignee: Comcast Cable Communications, LLC
G06F21/10G06F21/105H04L9/0819H04L63/062H04L63/10G06F2221/0724H04L2463/101
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Quick Facts
Patent No.
US 11,681,781
App. No.
15/901,491
Granted
Jun 20, 2023
Kind
B2
Abstract

Systems and methods are for content security may comprise transmitting a request for authorization to access secured content. A content key for the secured content may be received and stored to a restricted region of a memory. A device security module may have access to the restricted region and may decrypt, based on satisfaction of a use condition and using the content key, the secured content. An encryption key associated with a secure media system authorized to access the secured content may be received. The device security module may encrypt, using the encryption key, the secured content and route the secured content to the secure media system.

Claims (27)

1. A method comprising:

transmitting, by a computing device and to an authorization device, a request for authorization for a secure media system to access secured content;

receiving a key container associated with copying the secured content, wherein the key container comprises an encryption key associated with the secure media system and an indication of a permission for the secure media system to access the secured content;

decrypting, by a device security module of the computing device and based on the indication of the permission, the secured content using a content key, wherein the content key is isolated to the device security module;

encrypting, by the device security module and using the encryption key, the secured content; and

routing, by the device security module and to the secure media system, the secured content.

2. The method of claim 1 , wherein the secure media system comprises at least one of a playback device, a digital video recorder (DVR) device, a white box device, and a content management system.

3. The method of claim 1 , wherein the key container is encrypted; and

wherein the method further comprises decrypting, by the device security module and using a decryption key isolated to the device security module, the encrypted key container.

4. The method of claim 1 , wherein the content key isolated to the device security module comprises the content key stored to a restricted memory, wherein the device security module has access to the restricted memory.

5. The method of claim 1 , wherein the key container further comprises one or more conditions for accessing the secured content; and

wherein the method further comprises determining, by the device security module, compliance with the one or more conditions for accessing the secured content.

6. The method of claim 5 , wherein the encrypting the secured content is based at least on the determination of the compliance with the one or more conditions for copying the secured content.

7. A method comprising:

receiving, by a computing device and from a user device, a request to copy secured content using a secure media system;

determining that the secure media system is authenticated to access the secured content;

generating, based on the determining that the secure media system is authenticated, a key container, wherein the key container comprises an encryption key associated with the secure media system and an indication of a right of the secure media system to access the secured content; and

transmitting, to the user device, the key container.

8. The method of claim 7 , wherein the request comprises an indication of a device security module of the computing device; and

wherein the generating the key container is further based on a determination that the device security module complies with content security criteria.

9. The method of claim 7 , wherein the computing device comprises a device security module; and

wherein the generating the key container comprises encrypting, using a key associated with the device security module, at least a portion of the key container.

10. The method of claim 7 , wherein the request comprises an indication of a content security protocol of the secure media system; and

wherein the determining that the secure media system is authenticated is based at least on the content security protocol of the secure media system.

11. The method of claim 7 , wherein the request comprises at least one of a token, a digital signature, or a digital certificate of the secure media system; and

wherein the determining that the secure media system is authenticated to access the secured content is based on authentication of the at least one of the token, the digital signature, or the digital certificate.

12. The method of claim 7 , wherein the determining that the secure media system is authenticated to access the secured content is based on a database of authenticated secure media systems.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 21, 2018
From: PARK, KYONG
To: COMCAST CABLE COMMUNICATIONS, LLC
Reel/Frame 044991/0930 →
Continuity (1)
Related Publication 20190258778A1 · Aug 22, 2019
Cited By (2)
US 12,634,121 US 12,659,173