integrated circuit comprising a circuit for scrambling clinical recorded in a volatile memory zone.

摘要

The invention relates to an integrated circuit (mp2) comprising a volatile memory zone (dtmem), the content of which has a value determined after a reset to zero of the integrated circuit, the volatile memory zone being connected to a data bus dtb) (by means of a scrambler circuit (jmct) ensuring the coding of the data recorded in the memory zone and the decoding of the data read in the memory zone, the coding of the data being at least a function of a key (ks) applied to the scrambler circuit. According to the invention, the wrench applied to the scrambler circuit is a random key delivered by a generator of a random signal (rgen) arranged in order to change the value of the key at least at each new resetting to zero of the integrated circuit.