| 摘要 |
The invention concerns a method for verifying a message signature, the message, the signature, and a certificate having been sent by a signatory having a public key to an addressee having means (11) for storing messages. The invention is characterised in that it comprises the following steps which consist in: verifying the certificate, in the security means (21) connected to said storage means (11) of the addressee, and transmitting to display means (30) directly connected to the security means (21) at least a result information of verification; verifying the result information on the display means (30); after the certificate has been verified, calculating in the security means (21) a reduction of the message, and copying anew the message on the display means (30) as the reduction operation progresses; decrypting in said security means (21) the signature and the public key of the signatory; comparing the decrypted signature with the reduction performed; depending on the result of the comparison, sending a message, from the security means (21) to the display means (30), indicating whether or not the signature matches the message or the public key and signatory presented. The invention is useful for making secure exchanges on communication networks.
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