Patents by Inventor Stephen P. Bush

Stephen P. Bush 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).

  • Physical Unclonable Functions in Integrated Circuit Chip Packaging for Security
    Publication number: 20210242141
    Abstract: In the invention described, magnetic field characteristics of randomly placed magnetized particles are exploited by using the magnetic field fluctuations produced by the particles as measured by a sensor. The magnetized particles generate a complex magnetic field near the surface of an integrated circuit chip that can be used as a “fingerprint.” The positioning and orientation of the magnetized particles is an uncontrolled process, and thus the interaction between the sensor and the particles is complex. The randomness of the magnetic field magnitude and direction near the surface of the material containing the magnetic particles can be used to obtain a unique identifier for an item such as an integrated circuit chip carrying the PUF.
    Type: Application
    Filed: April 8, 2021
    Publication date: August 5, 2021
    Inventors: Stephen P. Bush, Gary A. Denton, James Paul Drummond, Kelly Ann Killeen, Carl E. Sullivan
  • Physical Unclonable Functions in Integrated Circuit Chip Packaging for Security
    Publication number: 20190139909
    Abstract: In the invention described, magnetic field characteristics of randomly placed magnetized particles are exploited by using the magnetic field fluctuations produced by the particles as measured by a sensor. The magnetized particles generate a complex magnetic field near the surface of an integrated circuit chip that can be used as a “fingerprint.” The positioning and orientation of the magnetized particles is an uncontrolled process, and thus the interaction between the sensor and the particles is complex. The randomness of the magnetic field magnitude and direction near the surface of the material containing the magnetic particles can be used to obtain a unique identifier for an item such as an integrated circuit chip carrying the PUF.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 9, 2019
    Inventors: Stephen P. Bush, Gary A. Denton, James Paul Drummond, Kelly Ann Killeen, Carl E. Sullivan