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:
May. 25, 2010
Filed:
Aug. 12, 2002
Peter Landrock, Cambridge, Cambridgeshire, CB30DX, GB;
Jonathan Roshan Tuliani, Milton, Cambridge, Cambridgeshire, CB4 6ZL, GB;
Peter Landrock, Cambridge, Cambridgeshire, CB30DX, GB;
Jonathan Roshan Tuliani, Milton, Cambridge, Cambridgeshire, CB4 6ZL, GB;
Other;
Abstract
An apparatus and method for signing electronic data with a digital signature in which a central server comprises a signature server () and an authentication server (). The signature server () securely stores the private cryptographic keys of a number of users (). The user () contacts the central server using a workstation () through a secure channel which is setup for the purpose. The user () supplies a password or other token (), based on information previously supplied to the user by the authentication server () through a separate authentication channel. The authentication server provides the signature server with a derived version of the same information through a permanent secure channel between the servers, which is compared with the one supplied by the user (). If they match, data received from the user () is signed with the user's private key.