Hardware protective measure to make it more difficult on the side channel attacks

摘要

An electronic circuit for the small signal moderate decoupling of an internal supply voltage of an external supply voltage u_Dd, with any desired logic circuits at an internal supply voltage u_{Dd, int} cooperating (2), comprising at least one local buffer circuit (3) consisting of at least – an improved separation circuit (7 (b)) between the external supply voltage u_Dd and a local buffer capacitor c_P– an internal local buffer capacitor c_P– a discharge circuit parallel to the buffer capacitor c_P for the local unloading of the buffer capacity.