Francis Yee-Dug Chan

US Patent:

7515710, Apr 7, 2009

Filed:

Mar 14, 2007

Appl. No.:

11/685929

Inventors:

Eric W. Grab - San Diego CA, US
Chris Russell - San Diego CA, US
Francis Chan - San Diego CA, US
Mike Kiefer - San Diego CA, US

Assignee:

DIVX, Inc. - San Diego CA

International Classification:

H04L 9/32

US Classification:

380201, 380 45, 380200, 726 6, 726 26, 726 31, 726 32, 726 33, 705 57, 705 58, 705 59, 713156

Abstract:

Federated systems for issuing playback certifications granting access to technically protected content are described. One embodiment of the system includes a registration server connected to a network, a content server connected to the network and to a trusted system, a first device including a non-volatile memory that is connected to the network and a second device including a non-volatile memory that is connected to the network. In addition, the registration server is configured to provide the first device with a first set of activation information in a first format, the first device is configured to store the first set of activation information in non-volatile memory, the registration server is configured to provide the second device with a second set of activation information in a second format, and the second device is configured to store the second set of activation information in non-volatile memory.

US Patent:

8201264, Jun 12, 2012

Filed:

Mar 25, 2009

Appl. No.:

12/411271

Inventors:

Eric W. Grab - San Diego CA, US
Chris Russell - San Diego CA, US
Francis Chan - San Diego CA, US
Mike Kiefer - San Diego CA, US

Assignee:

DIVX, LLC - Santa Clara CA

International Classification:

G06F 21/24

US Classification:

726 30, 726 6, 726 26, 726 27, 726 31, 726 32, 726 33, 713156, 713189, 380 45, 380200, 380201, 705 57, 705 58, 705 59

Abstract:

Federated systems for issuing playback certifications granting access to technically protected content are described. One embodiment of the system includes a registration server connected to a network, a content server connected to the network and to a trusted system, a first device including a non-volatile memory that is connected to the network and a second device including a non-volatile memory that is connected to the network. In addition, the registration server is configured to provide the first device with a first set of activation information in a first format, the first device is configured to store the first set of activation information in non-volatile memory, the registration server is configured to provide the second device with a second set of activation information in a second format, and the second device is configured to store the second set of activation information in non-volatile memory.

US Patent:

20110135090, Jun 9, 2011

Filed:

Nov 15, 2010

Appl. No.:

12/946631

Inventors:

Francis Yee-Dug Chan - San Diego CA, US
Kourosh Soroushian - San Diego CA, US
Andrew Jeffrey Wood - San Diego CA, US

Assignee:

DIVX, LLC. - San Diego CA

International Classification:

H04N 7/167

US Classification:

380210

Abstract:

Systems and methods for providing multimedia content from one process or component to another process or component over an unsecured connection are provided. One embodiment includes obtaining the cryptographic information, extracting the at least partially encrypted video data from the container file to create an elementary bitstream, enciphering the cryptographic information, inserting the cryptographic information in the elementary bitstream, providing the elementary bitstream to a video decoder, extracting the cryptographic information from the elementary bitstream at the video decoder, deciphering the cryptographic information, decrypting the elementary bitstream with the cryptographic information and decoding the elementary bitstream for rendering on a display device using the video decoder.

US Patent:

20130004142, Jan 3, 2013

Filed:

Mar 31, 2012

Appl. No.:

13/436927

Inventors:

Eric William Grab - San Diego CA, US
Francis Yee-Dug Chan - San Diego CA, US
Michael George Kiefer - Scottsdale AZ, US

Assignee:

Rovi Corp. - Santa Clara CA

International Classification:

H04N 5/93

US Classification:

386259, 386248, 386E05028

Abstract:

Systems and methods for authenticating playback devices using timestamp validation in accordance with embodiments of the invention are disclosed. One embodiment includes measuring a time difference between the system clock and a clock on a remote server, retrieving at least one reference time difference from the playback device, where the reference time difference is stored in the playback device, determining whether the system clock of the playback device is valid by comparing the measured time difference to reference time difference, retrieving at least one timestamp when the measured time difference is valid, where each of the at least one timestamps is securely stored by the playback device in response to the occurrence of a predetermined event and is based on the current time of the system clock of the playback device when the predetermined event occurred, and determining whether the system clock is valid based upon the retrieved timestamp.

US Patent:

20130006869, Jan 3, 2013

Filed:

Mar 31, 2012

Appl. No.:

13/436888

Inventors:

Eric William Grab - San Diego CA, US
Kourosh Soroushian - San Diego CA, US
Tung Lin - San Diego CA, US
Francis Yee-Dug Chan - San Diego CA, US
Evan Wallin - San Diego CA, US

Assignee:

Rovi Corp. - Santa Clara CA

International Classification:

G06F 21/00

US Classification:

705 51

Abstract:

Systems and methods for identifying consumer electronic products using a playback device with a product identifier in accordance with embodiments of the invention are disclosed. In one embodiment, a playback device includes a processor and memory configured to store a product identifier, where the product identifier is associated with a specific product and is associated with cryptographic information, wherein the processor is configured by a client application to request content from a server, communicate the product identifier to a server, and receive encrypted content accessible using cryptographic information including the cryptographic information associated with the product identifier.

US Patent:

20130007443, Jan 3, 2013

Filed:

Mar 31, 2012

Appl. No.:

13/436898

Inventors:

Eric William Grab - San Diego CA, US
Kourosh Soroushian - San Diego CA, US
Tung Lin - San Diego CA, US
Francis Chan - San Diego CA, US
Evan Wallin - San Diego CA, US

Assignee:

Rovi Corp. - Santa Clara CA

International Classification:

H04L 29/06
G06F 21/00

US Classification:

713156, 713155, 726 26, 713150

Abstract:

Systems and methods for identifying consumer electronic products using a playback device with a product identifier in accordance with embodiments of the invention are disclosed. One embodiment includes a processor, and memory configured to store a product identifier, where the product identifier is associated with a specific product and is associated with cryptographic information, and user account data, where the user account data is associated with a user account. In addition, the processor is configured by an application to receive a request for registration from a playback device, receive a product identifier from the playback device, retrieve cryptographic information using the playback device, and send user account data to the playback device encrypted using at least the cryptographic information associated with the product identifier.

US Patent:

20130007467, Jan 3, 2013

Filed:

Dec 28, 2011

Appl. No.:

13/339315

Inventors:

Francis Yee-Dug Chan - San Diego CA, US
Eric William Grab - San Diego CA, US
Michael George Kiefer - Scottsdale AZ, US

Assignee:

DIVX, LLC - Santa Clara CA

International Classification:

G06F 12/14

US Classification:

713189

Abstract:

Systems and methods for binding of cryptographic content using unique device characteristics with server heuristics in accordance with embodiments of the invention are disclosed. One embodiment includes a processor and memory includes collecting a combination of device characteristics that uniquely identify the device using information stored on the device and accessible to the device using the device processor, generating device match data based upon the collected combination of device characteristics using the device processor, generating a device protection key using the device match data, encrypting the cryptographic data using the device protection key, and storing the encrypted cryptographic data in device memory using the device processor.

US Patent:

20130007471, Jan 3, 2013

Filed:

Mar 31, 2012

Appl. No.:

13/436930

Inventors:

Eric William Grab - San Diego CA, US
Francis Yee-Dug Chan - San Diego CA, US
Michael George Kiefer - Scottsdale AZ, US

Assignee:

Rovi Corp. - Santa Clara CA

International Classification:

G06F 21/24
G06F 12/14

US Classification:

713193

Abstract:

Systems and methods for authenticating playback devices using timestamp validation in accordance with embodiments of the invention are disclosed. One embodiment includes securely storing at least one timestamp in memory within a playback device in response to the occurrence of at least one predetermined event, where a stored timestamp is based on the current time of a system clock when an event occurs, generating a cryptographic key using the at least one timestamp, securing cryptographic data using the cryptographic key, receiving a request to playback encrypted content, where the encrypted content is accessible using the cryptographic data, accessing the at least one timestamp, generating the cryptographic key, accessing the cryptographic data using at least the cryptographic key, and playing back the content using the playback device.

Author:

Francis Chan

ISBN #:

0309046122