RADIO IDENTIFICATION WITH AN ADDITIONAL CLOSE-RANGE CHECK

摘要

The invention relates to a method and a system for radio identification with an additional close-range check, which prevent misuse of a radio identification system and increase the security of radio identification. In particular, so-called relay attacks are to be largely prevented in passive entry systems. The method according to the invention firstly provides for activation of a transponder (S1) for reading of its data. After this step, an additional close-range status signal is provided (S2) which indicates the close range of a reader. Once the close-range status signal has been detected by a transponder (S3), data transmission for reading of the data stored in the transponder by the reader is possibly enabled in reaction to the detection of the close-range status signal (S4) and the data can be read by the reader for identification of the transponder (S5). The system according to the invention for radio identification with an additional close-range check consists of a reader for reading the data stored in a transponder and of an evaluation unit which is connected to the reader for identifying the transponder on the basis of the read data.