Method and circuitry for producing a pseudo random sequence and its use.

摘要

The invention proposes a method and a circuit arrangement for carrying out the method in order to generate a pseudorandom sequence of bit data, using a shift register device (1, 2, 5) with feedback. After a sequence of switching states of the shift register device (1), by means of which it is determined whether the bit data should be output, the bit data are output. The method and the circuit arrangement are preferably used for encrypting data, particularly for the authenticity detection of a data carrier arrangement, for example of chip cards.