Patents by Inventor Edward Pearce Wobber

Edward Pearce Wobber 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).

  • Patent number: 7660993
    Abstract: Methods and systems are provided for a cancellation server maintaining a database of identifiers of cryptographic puzzles. A cryptographic puzzle is created from a unique identifier and a timestamp, and is attached to an electronic mail message, along with the puzzle's solution. The recipient verifies that the solution is correct and that the timestamp is current, and further queries the cancellation server with the puzzle identifier. If the identifier does not exist in the database, then the recipient knows the received message is legitimate. If the identifier already appears in the database, the received message can be automatically removed from the recipient's computer.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: February 9, 2010
    Assignee: Microsoft Corporation
    Inventors: Andrew D. Birrell, Michael Burrows, Edward Pearce Wobber