Method for certifying the authenticity of a datum exchanged between two devices connected locally or remotely by a transmission line
US4907270A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Mar 10, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The subject of the invention is a method for certifying the authenticity of a datum exchanged between two devices connected locally or at long distance by a transmission line. The transmitting device (2) fashions an enciphered message (M) on the basis of a parameter (X) at least one field (X1) of which must satisfy a predetermined condition and one field (X3) corresponds to the datum (d) to be transmitted. The receiving device (1) deciphers the message (M) in order to find a parameter (X') the field (X'1) of which must satisfy the same condition as the field (X1) for which the field (X'3) corresponds to the datum (d) transmitted. The invention is applicable in particular to credit cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.