Patents by Inventor Sherry E. Vanstone

Sherry E. Vanstone 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).

  • One way authentication
    Patent number: 8938617
    Abstract: A cryptosystem prevents replay attacks within existing authentication protocols, susceptible to such attacks but containing a random component, without requiring modification to said protocols. The entity charged with authentication maintains a list of previously used bit patterns, extracted from a portion of the authentication message connected to the random component. If the bit pattern has been seen before, the message is rejected; if the bit pattern has not been seen before, the bit pattern is added to the stored list and the message is accepted.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: January 20, 2015
    Assignee: Certicom Corp.
    Inventors: Scott A. Vanstone, Sherry E. Vanstone