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:
Feb. 20, 2018
Filed:
Jun. 02, 2017
Cryptomathic Ltd, Cambridge, Cambridgeshire, GB;
Guillaume Forget, Grasbrunn, DE;
Torben Pryds Pedersen, Aarhus C, DK;
Peter Landrock, Cambridge, GB;
Cryptomathic Ltd., Cambridge, Cambridgeshire, GB;
Abstract
A method for validating a signature request for a first message M, comprising: receiving, a validation challenge (VC) from a signature creation device (SCD), the VC created by the SCD, in response to receiving the signature request and message M from a user, using a second message M' which is based on message M and a secret shared between the SCD and user, the VC generated by encrypting message M′ using the secret; generating, the message M′ from the VC by decrypting the VC using the secret; displaying the message M′ to the user; receiving confirmation from the user that the displayed message M′ corresponds to the message M; generating, a validation code confirming the signature request to create a signature; and outputting the code to the SCD, to cause the SCD to generate the signature for the user for message M based on successfully verifying the code.