Patents by Inventor Matthew Messerman

Matthew Messerman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for synchronized key derivation across multiple conditional access servers
    Patent number: 10284365
    Abstract: Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier that identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: May 7, 2019
    Assignee: Verimatrix, Inc.
    Inventors: Matthew Messerman, Thomas Handal, Matthew Fite, Gerd Mersmann
  • System and Method for Synchronized Key Derivation across Multiple Conditional Access Servers
    Publication number: 20180227117
    Abstract: Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier that identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 9, 2018
    Applicant: Verimatrix, Inc.
    Inventors: Matthew Messerman, Thomas Handal, Matthew Fite, Gerd Mersmann
  • System and method for synchronized key derivation across multiple conditional access servers
    Patent number: 9887837
    Abstract: Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier than identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: February 6, 2018
    Assignee: Verimatrix, Inc.
    Inventors: Matthew Messerman, Thomas Handal, Matthew Fite, Gerd Mersmann
  • System and Method for Synchronized Key Derivation across Multiple Conditional Access Servers
    Publication number: 20160254907
    Abstract: Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier than identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.
    Type: Application
    Filed: October 31, 2014
    Publication date: September 1, 2016
    Applicant: Verimatrix, Inc.
    Inventors: Matthew Messerman, Thomas Handal, Matthew Fite, Gerd Mersmann