The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Jun. 07, 2001
Mikael Thuvesholmen, Malmö, SE;
Mads Dore Hansen, Hadsund, DK;
Tomas Edso, Lund, SE;
Kristofer Skantze, Lund, SE;
Mikael Thuvesholmen, Malmö, SE;
Mads Dore Hansen, Hadsund, DK;
Tomas Edso, Lund, SE;
Kristofer Skantze, Lund, SE;
Anoto AB, Lund, SE;
Abstract
A method and a corresponding device for generating true random numbers for use in encryption of a message for secure transmission of said message from a sending device to a receiver, or for authentication of a sent message. An optical image represented by optical data is obtained by an optical sensor and processed in order to improve the stochasticity of the optical data. The thus processed data is then used for generating random numbers which can be used as an encryption key, or for generating an encryption key, for subsequent use in an encryption algorithm for encrypting the message. The method is implemented in a digital pen (DP) to be used in an information management system.