Method and apparatus for authenticating a data carrier intended to enable a transaction or access to a service or a location, and corresponding carrier
US5867577A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1995 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Mar 9, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/0866
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and an apparatus for authenticating a data carrier enables a transaction or access to a service or a location, and the corresponding carrier. The carrier (1) has a specific number (Ns) and an authentication value calculated from the specific number and from information (I) that defines the rights attaching to the carrier by means of an asymmetrical algorithm (F) and a secret key (Ks). Two types of authentication are provided. One is current, in a mode disconnected from the authorizing organization. The other is periodic, in a connected mode. In the disconnected mode, an algorithm (G) correlated with the asymmetrical algorithm (F) and using a public key (Kp) is applied to the authentication value (VA), read from the carrier, in order to verify that the authentication value (VA) is compatible with the specific number (Ns) and the information (I), and that the transaction or service requested is compatible with the information (I). In the connected mode, it is also possible to modify the authentication value of the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.