Protection device for preventing power analysis attacks on chip card systems obscures the memory power consumption of the processor unit by increasing its power consumption when a power analysis access attempt is made

摘要

Device (100) for generating additional power consumption in a data processing device (102) that has a processor (110) and a memory (112). The device for generating the additional power consumption is configured so that the additional power consumption is superimposed on the useful power consumption when a unit (120) detects that an access attempt is being made to the processor memory. The power is superimposed by a unit (122) for accessing the memory so that its power consumption is increased as a result of the access.