System having a plurality of service facilities with access control devices
US7857213B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2007 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Apr 10, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/15
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system has a plurality of groups of service facilities, each facility having an access control device with a read/write device for a contactless data carrier. The read/write devices of each group are networked with a separate database provided for each group. The data carrier has an identification number and a transaction counter with a transaction number which is changed upon a change of application data stored thereon. The application data, the identification number and the transaction number are stored in the database of the group to which the user goes for access. Upon access to a service facility, only the identification number and the transaction number are read from the data carrier. If the identification number and transaction number match with the identification number and transaction number stored in the database, the application data is retrieved from the database, and in case of a valid access authorization, the access control device permits access without reading application data from the data carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.