Patents by Inventor Mathias Widman

Mathias Widman 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 encryption and authentication
    Patent number: 7864954
    Abstract: A method and a system for encrypted transmission or authentication between at least two units via an insecure communication channel, comprising the steps of: (a) in an initiation procedure, producing a common original value to be used in the respective units; (b) synchronising a counting value in each unit; (c) generating a key on the basis of the original value and the counting value in each unit, independently of other units; and (d) using the thus generated key in a subsequent encrypted transmission or authentication operation.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: January 4, 2011
    Assignee: Impsys AB
    Inventor: Mathias Widman
  • Data communication security arrangement and method
    Publication number: 20050154896
    Abstract: A novel and efficient encryption and decryption method and arrangement is presented for synchronization of a communication session for encrypted transmission or authentication between at least two communicating units, a first unit and a second unit communicating via a communication channel. Each unit comprises a session counter (X, Y). The method comprises a handshake procedure whereby the synchronization of session counters is obtained by successively communicated signatures between said communicating units.
    Type: Application
    Filed: September 30, 2004
    Publication date: July 14, 2005
    Inventors: Mathias Widman, Hans Svensson, Christer Johansson
  • Method and system for encryption and authentication
    Publication number: 20030156721
    Abstract: A method and a system for encrypted transmission or authentication between at least two units via an insecure communication channel, comprising the steps of: (a) in an initiation procedure, producing a common original value to be used in the respective units; (b) synchronising a counting value in each unit; (c) generating a key on the basis of the original value and the counting value in each unit, independently of other units; and (d) using the thus generated key in a subsequent encrypted transmission or authentication operation.
    Type: Application
    Filed: January 17, 2003
    Publication date: August 21, 2003
    Inventor: Mathias Widman