Digital electronic component which is protected against electrical-type analyses
AssigneeNagra Thomson Licensing
InventorsJean-Luc Dauvois, Jérôme Perrine
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Abstract
This invention relates to a digital electronic component which is protected against electrical- and/or electromagnetic-type analyse). The inventive component comprises: a synchronous element (10) which is controlled by a clock (H); means (11, 12) of generating said clock (H), the frequency of which varies randomly between a minimum value and a maximum value for at least a given period of time; and means (13) of controlling the random nature of the frequency change of said clock (H).
Claims7
A digital electronic component that is protected against analyzes of the electrical and electromagnetic type comprising a synchronous element driven by a clock, wherein the clock comprises a random frequency instruction generator and wherein the frequency of the clock varies in a random manner between a minimum value and a maximum value during at least a given time period;
- and wherein the frequency generator comprises at least at least two PLL circuits as frequency synthesizers and means for switching from a first frequency to a second frequency by switching from a first PLL circuit to a second PLL circuit.
Dependencies are inferred from the claim text.