Circuit for generation of a signature for use in validating data arising from integrated circuits as used in transponder circuits in smart cards, car keys, etc., the circuit being small and having low power consumption

摘要

Circuit comprises a logic gate (30) with two inputs and one output, receiving a plurality of input words (DIN), a shift register (31) with a data input, a clock input and an output, with the clock signal (CP) used to control the timing of the plurality of words, the data input being connected to the output of the logic gate (30) and the output being connected to the other input of the said gate.