Patents by Inventor Erik Guttman

Erik Guttman 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).

  • Publication number: 20090313356
    Abstract: A method and apparatus are provided for producing a decorated networking identifier at a client terminal for transmission to a server side element. The networking identifier is obtained at the client terminal. The networking identifier is appended with one or more extensible decorations at the client terminal creating the decorated networking identifier. The one or more extensible decorations are separated from the networking identifier by a first predetermined character. The one or more decorations each include a decoration sequence and an identifier corresponding to the decoration sequence. The identifier and the decoration sequence are separated by a second predetermined character. The decorated networking identifier is transmitted from the client terminal to the server side element.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 17, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Erik GUTTMAN, Tae-Sun Yeoum, Han-Na Lim
  • Patent number: 6944663
    Abstract: One embodiment of the present invention provides a system that protects a server against denial-of-service attacks. During operation, the server receives a request for service from a client. Note that the client can be distinguished from other clients, for example, by its source IP address. In response to this request, the server sends a random number, y, and an identifier, id1, to the client, and allows the client to compute a preimage, x, such that y=h(x). Upon receiving an answer from the client including the preimage x and an identifier, id2, the server verifies that the identifier, id1, sent to the client matches the identifier, id2, received from the client. If the identifiers match, the server computes h(x), and compares h(x) against y. If h(x)=y, the server performs the requested service for the client. In this way, the server avoids computing h(x) until the server receives the answer with a matching identifier.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: September 13, 2005
    Assignee: Sun Microsystems, Inc.
    Inventors: Christoph L. Schuba, Erik Guttman
  • Publication number: 20030172159
    Abstract: One embodiment of the present invention provides a system that protects a server against denial-of-service attacks. During operation, the server receives a request for service from a client. Note that the client can be distinguished from other clients, for example, by its source IP address. In response to this request, the server sends a random number, y, and an identifier, id1, to the client, and allows the client to compute a preimage, x, such that y=h(x). Upon receiving an answer from the client including the preimage x and an identifier, id2, the server verifies that the identifier, id1, sent to the client matches the identifier, id2, received from the client. If the identifiers match, the server computes h(x), and compares h(x) against y. If h(x)=y, the server performs the requested service for the client. In this way, the server avoids computing h(x) until the server receives the answer with a matching identifier.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 11, 2003
    Inventors: Christoph L. Schuba, Erik Guttman