Patents by Inventor Matthew J. Sibley

Matthew J. Sibley 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).

  • Overlay network for tracking denial-of-service floods in unreliable datagram delivery networks
    Patent number: 8234707
    Abstract: An approach for tracking denial-of-service (DoS) flood attacks using an overlay IP (Internet Protocol) network is disclosed. One or more tracking routers form an overlay tracking network over the network of an Internet Service Provider (ISP). The ISP network includes numerous transit routers and edge routers. The tracking routers communicate directly with all the edge routers using IP tunnels. The edge routers within the ISP network perform security diagnostic functions, in part, to identify a DoS flood attack that has been launched by one or more attackers. To track down an attacker, an egress edge router identifies the DoS flood attack datagrams, rerouting these datagrams to the overlay tracking network. The tracking routers perform hop-by-hop input debugging to identify the ingress edge router associated with the source of the DoS flood attack.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: July 31, 2012
    Assignee: MCI International, Inc.
    Inventors: Robert J. Stone, Matthew J. Sibley
  • Overlay network for tracking denial-of-service floods in unreliable datagram delivery networks
    Patent number: 7062782
    Abstract: An approach for tracking denial-of-service (DoS) flood attacks using an overlay IP (Internet Protocol) network is disclosed. One or more tracking routers form an overlay tracking network over the network of an Internet Service Provider (ISP). The ISP network includes numerous transit routers and edge routers. The tracking routers communicate directly with all the edge routers using IP tunnels. The edge routers within the ISP network perform security diagnostic functions, in part, to identify a DoS flood attack that has been launched by one or more attackers. To track down an attacker, an egress edge router identifies the DoS flood attack datagrams, rerouting these datagrams to the overlay tracking network. The tracking routers perform hop-by-hop input debugging to identify the ingress edge router associated with the source of the DoS flood attack.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: June 13, 2006
    Assignee: UUNet Technologies, Inc.
    Inventors: Robert J. Stone, Matthew J. Sibley