Michael G Kiefer

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:

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.

US Patent:

20130061040, Mar 7, 2013

Filed:

Dec 30, 2011

Appl. No.:

13/341265

Inventors:

Michael George Kiefer - Scottsdale AZ, US
Eric William Grab - San Diego CA, US
Jason Braness - San Diego CA, US

Assignee:

DIVX, LLC - Santa Clara CA

International Classification:

H04L 9/00
H04L 9/08

US Classification:

713155, 713150

Abstract:

Systems and methods for performing adaptive bitrate streaming using alternative streams of protected content in accordance with embodiments of the invention are described. One embodiment includes a processor, and non-volatile storage containing an encoding application. In addition, the encoding application configures the processor to: receive source content; obtain common cryptographic information; encode the source content as a plurality of streams including a plurality of alternative streams of content; and protect the plurality of alternative streams of content using the common cryptographic information.

US Patent:

20130061045, Mar 7, 2013

Filed:

Dec 29, 2011

Appl. No.:

13/340623

Inventors:

Michael George Kiefer - Scottsdale AZ, US
Eric William Grab - San Diego CA, US
Jason Braness - San Diego CA, US

Assignee:

DIVX, LLC - Santa Clara CA

International Classification:

H04L 9/00

US Classification:

713160, 713150

Abstract:

Systems and methods for performing adaptive bitrate streaming using alternative streams of protected content in accordance with embodiments of the invention are described. One embodiment of the invention includes a processor, and memory containing a client application. In addition, the client application configures the processor to: request a top level index file identifying a plurality of alternative streams of protected content, where each of the alternative streams of protected content are encrypted using common cryptographic information; obtain the common cryptographic information; request portions of content from at least the plurality of alternative streams of protected content; access the protected content using the common cryptographic information; and playback the content.

US Patent:

20210256095, Aug 19, 2021

Filed:

Dec 28, 2020

Appl. No.:

17/135724

Inventors:

- San Diego CA, US
Chris Russell - San Diego CA, US
Francis Yee-Dug Chan - San Diego CA, US
Michael George Kiefer - Lake Havasu City AZ, US

Assignee:

DIVX, LLC - San Diego CA

International Classification:

G06F 21/10
H04N 21/222
H04N 21/266
H04N 21/4627
H04N 21/8355
H04L 9/32
H04L 29/06

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:

20190318061, Oct 17, 2019

Filed:

Apr 17, 2019

Appl. No.:

16/387519

Inventors:

- San Diego CA, US
Jian Zhao - San Diego CA, US
Michael George Kiefer - San Diego CA, US

International Classification:

G06F 21/10

Abstract:

Content screening operations, which can include watermark extraction and the application of content usage enforcement actions, may be organized such that some or all of the operations can be conducted by different devices that are connected via connectors such as HDMI (High-Definition Multimedia Interface (HDMI), analog composite video, DVI (Digital Visual Interface), SDI (Serial Digital Interface), DisplayPort, or networked via Ethernet or wireless. Authentication and encryption methods are disclosed that can be used to establish the trust and secure communication between devices that conduct collaborative content screening. Delegation architecture may be based on ascertained screening capabilities of the sink device wherein the source device verifies that the sink device is capable and trusted to perform partial or whole screening operations delegated by the source. Alternatively, delegation architecture may be based on ascertained screening capabilities of the source device wherein the sink device verifies that the source device is capable and trusted to provide correct content credential and content use policy (“content credential”) that is needed for the sink device to determine whether content screening should be performed, and if yes, what content screening operations should be performed.

US Patent:

20180060543, Mar 1, 2018

Filed:

Oct 23, 2017

Appl. No.:

15/791265

Inventors:

- San Diego CA, US
Chris Russell - San Diego CA, US
Francis Yee-Dug Chan - San Diego CA, US
Michael George Kiefer - Lake Havasu City AZ, US

Assignee:

Sonic IP, Inc. - San Diego CA

International Classification:

G06F 21/10
H04N 21/222
H04N 21/8355
H04L 9/32
H04L 29/06
H04N 21/266
H04N 21/4627

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.