A method for challenge-response authentication between a reader and a transponder based on a contactless data transmission

摘要

The invention relates to a method for challenge-response authentication between a reader and a transponder based on a contactless data transmission. In the method according to the invention, challenge data (CH) are transmitted by the reader to the transponder by means of one or more commands (AC) of an anti-collision method within an anti-collision loop, whereby the command (s) serve to determine transponder identification data. In this case, challenge data (CH) in a data field (D1), which is used for the specification of transponder identification data (UID), are contained in the one or more commands (AC), wherein by a parameter value (NVB) in the or at least one the command (AC) the transponder is displayed that the data field (D1) of the one or more commands (AC) instead of the transponder identification data (UID) Challenge data (CH) contains. The transponder recognizes on the basis of the parameter value (NVB) that challenge data (CH) is contained in the receiving command (s), whereupon the transponder processes the transmitted challenge data based on the challenge-response authentication.