Patents by Inventor Jeffrey Bruce Lotsplech

Jeffrey Bruce Lotsplech 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, method, and service for tracing traitors from content protection circumvention devices
    Patent number: 8023655
    Abstract: A traitor tracing system generates a hypothesized model of the circumvention device that models a hypothesized set of device keys compromised by the circumvention device. The system iteratively invokes a subset tracing system to identify a compromised device key until substantially all the compromised device keys in the set of compromised device keys are identified so as to disable the circumvention device. A subset tracing system generates a circumvention device model that models behavior of a circumvention device using prior knowledge and The system iteratively selects and applies to the circumvention device a test based on the hypothesized model and the circumvention device model and receives a response from the circumvention device indicating a success of the test in playing protected content on the circumvention device.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: September 20, 2011
    Assignee: International Business Machines Corporation
    Inventors: Hongxia Jin, Jeffrey Bruce Lotsplech, Philip Anastasios Zigoris