Patents by Inventor Richard Sowell

Richard Sowell 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).

  • Soft message signing
    Patent number: 8667283
    Abstract: A message is signed using a PUF without having to exactly regenerate a cryptographic key. Another party that shares information about the PUF is able to verify the signature to a high degree of accuracy (i.e., high probability of rejection of a forged signature and a low probably of false rejection of a true signature). In some examples, the information shared by a recipient of a message signature includes a parametric model of operational characteristics of the PUF used to form the signature.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: March 4, 2014
    Assignee: Verayo, Inc.
    Inventors: William Henry Bares, Srinivas Devadas, Vivek Khandelwal, Zdenek Paral, Richard Sowell, Tonghang Zhou
  • SOFT MESSAGE SIGNING
    Publication number: 20120290845
    Abstract: A message is signed using a PUF without having to exactly regenerate a cryptographic key. Another party that shares information about the PUF is able to verify the signature to a high degree of accuracy (i.e., high probability of rejection of a forged signature and a low probably of false rejection of a true signature). In some examples, the information shared by a recipient of a message signature includes a parametric model of operational characteristics of the PUF used to form the signature.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 15, 2012
    Applicant: Verayo, Inc.
    Inventors: William Henry Bares, Srinivas Devadas, Vivek Khandelwal, Zdenek Paral, Richard Sowell, Tonghang Zhou
  • FIFO for coupling asynchronous channels
    Patent number: 5305319
    Abstract: An efficient and optimized FIFO memory for use in a bus master system utilizes a multiplexing clock from which control signal defining bus cycles on asynchronous system and local buses. The FIFO facilitates interleaved access by system and local buses to support high speed data transfers from devices on one bus to the other bus.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: April 19, 1994
    Assignee: Chips and Technologies, Inc.
    Inventor: Richard Sowell
  • Non-aligned DRAM state machine for page-mode DRAM control
    Patent number: 5210856
    Abstract: An apparatus and method for operating a system component in a microprocessor system. The component is operated by a component controller which runs off a clock having a frequency different than the system clock. The controller is synchronized with the system clock at the conclusion of a component access cycle. The state machine of the controller can thus operate independently of the system clock and timing options implemented by the controller need not have an even number of states.
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: May 11, 1993
    Assignee: Chips and Technologies, Inc.
    Inventors: Stuart Auvinen, Richard Sowell