Patents by Inventor Frank Horsfall

Frank Horsfall 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).

  • Security association storage and recovery in group key management
    Patent number: 7395423
    Abstract: A method for preserving security associations between at least two entities includes the steps of maintaining a security association relating to communication between the at least two entities in a table, and periodically storing the security association in non-volatile storage. With such an arrangement, in the event that data within the table become corrupted, it can be retrieved from storage. Because the key data is stored, performance losses due to re-establishing the secure group are minimized. In one embodiment, the security association is advantageously encrypted prior to storage to further secure the security associations for each member.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: July 1, 2008
    Assignee: Nortel Networks Limited
    Inventors: Lakshminath Dondeti, Michael Lee, Frank Horsfall
  • Fast re-establishment of communications for virtual private network devices
    Patent number: 7350233
    Abstract: A method and apparatus has been described that permits fast re-establishment of secure communications between endpoints in a network through intelligent re-use of existing security associations.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: March 25, 2008
    Assignee: Nortel Networks Limited
    Inventors: Michael Lee, Lakshminath Dondeti, Frank Horsfall