Method for verifying a message signature
US7039808B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2153
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method for checking the signature of a message, the message, signature, and a certificate having been sent by a signer having a public key to a recipient having a message storage device. According to the invention, the method includes the stages according to which: the certificate in the protected device connected to the storage device of the recipient and checked and at least one checking result data element is sent to a display device connected directly to the protected device, the result data element is checked on the display 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 during the reduction operation, the signature with the public key of the signer is decrypted in the protected device, and the decrypted signature is compared with the reduction carried out, according to the result of the comparison, a message is sent from the protected device to the display device indicating that the signature conforms/does not conform to the message or to the public key of the signer put forward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.