| 摘要 |
A method, a logic machine and a circuit for producing an authentication code (CA), in particular for authenticating smart cards. The method comprises a cycle of steps wherein a bit word is read out of a secret memory (21) comprising a plurality of bit words, and words read out during previous cycles are combined. The result of the combination is used as a generator word (GA) for generating the address of the word to be read out in the next cycle.
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