| 摘要 |
The invention concerns a method for jamming the operating conditions of a logic circuit (30) designed to execute a specific logic function. The invention is characterised in that it consists in: providing in the logic circuit logic gates (10) and/or transistors adapted to execute the logic function at least in two different ways, the way in which the logic function is executed being determined by the value of a function selecting signal (R) applied to the logic circuit; then in applying to the logic circuit a random function selecting signal (R), and in refreshing the function selecting signal at specific times, so as to jam the operating conditions of the logic circuit. Thus, for identical data applied to the logic circuit input and different values of function selecting signal, the polarities of certain internal nodes of the logic circuit and/or the logic circuit power consumption are not identical.
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