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:
Oct. 25, 2011
Filed:
Nov. 12, 2003
Arnaud Fausse, Paris, FR;
Arnaud Fausse, Paris, FR;
Gemalto SA, Meudon Cedex, FR;
Abstract
Method for checking the signature of a message. The message, signature, and a certificate are sent by a signer having a public key to a recipient having a message storage device. The certificate is checked by a protected device connected to the message storage device and a checking result data element is sent for checking to a display device connected to the protected device. When the certificate is verified, a reduction of the message is calculated in the protected device and the message is recopied onto the display device. The signature is decrypted using the public key in the protected device, and the decrypted signature is compared with the reduction carried out. According to the comparison, a message is sent from the protected device to the display device indicating whether the signature conforms or does not conform to the message or to the public key of the signer put forward.