| 摘要 |
The invention discloses a method of reading data (dat) from a first transponder (TAG1) into a transceiver (REA). Said (dat) are only transmitted from the first transponder (TAG1) to the transceiver (REA) when a second transponder (TAG2) is present within the RFID communication range of the transceiver (REA) and if a positive authentication procedure between the two transponders (TAG1, TAG2) within the RFID communication range of the transceiver (REA) takes place. The second transponder (TAG2) is preferably a stationary transponder (TAG2), whereas the first transponder (TAG1) may be a mobile transponder. The invention further relates to transponders (TAG1, TAG2) as well as to a transceiver (REA) used in such a method of reading data (dat). Furthermore, the invention relates to a poster (POS), to which a first transponder (TAG1) is attached, and to a poster wall (WAL) for attaching such a poster (POS) and a second transponder (TAG2). |
| 主权项 |
1. A method of reading data from a first passive RFID transponder into a transceiver, the method comprising:
limiting access to data stored on the first transponder only if the presence of a second passive RFID transponder can be verified by verifying that said first transponder and the second transponder are within an RFID communication range of the transceiver at the same time, the verification including:
transmitting a request from the transceiver to the first transponder, the request being for the data stored at the first transponder,at the transceiver, receiving exchange information generated by said first transponder in response to the request,transmitting said exchange information from the transceiver to said second transponder,at the transceiver, receiving encrypted information transmitted from the second transponder in response to the exchange information, the encrypted information representing further exchange information, that is different from the exchange information, transmitted by the first transponder scrambled with a key of the second transponder,transmitting said encrypted information from the transceiver to the first transponder, andcommunicating the requested data from the first transponder to the transceiver based on said encrypted information transmitted to the first transponder. |
