Patents by Inventor Robert R. Branum, Jr.

Robert R. Branum, Jr. 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).

  • Method and system for prevention of network denial-of-service attacks
    Patent number: 7424741
    Abstract: An approach for preventing denial-of-service attacks on Secure Sockets Layer (“SSL”) protocol is described. Queues are generated for handshake state connections and data transmission connections. A connection object representing a new SSL connection is time-stamped as it enters the handshake portion of the SSL protocol. A connection pointer to the connection object is placed at the head of the handshake queue. As new SSL messages are transferred between client and SSL server, the time-stamp is updated when the entire message is received, the connection pointer is repositioned to the head of the queue. A timer event periodically surveys the queues. If connection packet transmission gaps remain below a specified maximum handshake gap time, a connection is allowed to progress to the data transmission state. If any connection exceeds the specified gap time, the SSL connection is dropped.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: September 9, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Martin Grimm, Brad Barfield, Eric Fritzges, Hema Prasad, Robert R. Branum, Jr.