Patents by Inventor Håkon Hammerstad

Håkon Hammerstad 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).

  • Sequence numbering mechanism to ensure execution order integrity of inter-dependent smart card applications
    Patent number: 6490720
    Abstract: Software code of a software program is executed in a multi-processor computer environment. The software code includes a first portion and a second portion. The first portion is executed in a computer. The second portion is executed in one or more tamper-resistant external devices which are in communication with the computer. The second portion includes a plurality of different blocks of code. At least some of the blocks have sequence data associated therewith. If sequence data exists in the current block of code to be executed in the one or more external devices, then the sequence data is used to determine if execution of the block of code is permissible or should be inhibited. The sequence data includes predecessor data and successor data.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: December 3, 2002
    Assignee: Sospita AS
    Inventors: Ulf Carlsen, Håkon Hammerstad