| 摘要 |
A method for challenge-response authentication between a reading device and a transponder based on a contactless data transmission, according to which challenge data (CH) are transferred within an anti-collision loop from the reading device to the transponder by means of one or several commands (AC) of an anti-collision method, with the command or commands (AC) serving to determine transponder identification data. In the command or commands (AC) respective challenge data (CH) are contained in a data field (D1) that is used for specifying transponder identification data (UID), wherein it is indicated to the transponder by a parameter value (NVB) in the command or at least one of the commands (AC) that the data field (D1) of the command or commands (AC) contains challenge data (CH) instead of transponder date (UID). The transponder recognizes with the help of the parameter value (NVB) that in the received command or commands (AC) challenge data (CH) are contained, whereupon the transponder processes the transferred challenge data based on the challenge-response authentication.
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