Method for prohibiting unauthorized access in a non-contacting data carrier system
US6823459B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2000 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Feb 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/35
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
To provide a method whereby unauthorized data access by an RFID data processing system is prohibited without any degradation of performance being incurred. An RFID data processing system 30 comprises a CPU 35, a EEPROM 34, communication devices 31 and 32, and power controllers 40 and 41. When an RFID data processing system 30 in the power-ON state that does not have access authorization passes through a portal gate located at the entrance to an unauthorized data access protection area, the portal gate transmits a signal to set ON a tamper bit 44 in the EEPROM 34. When the tamper bit 44 has been set ON, a tamper bit interrupt request signal is output by the EEPROM 34. Upon receiving this signal, the power controllers 40 and 41 power off the RFID data processing system 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.