Protection against side-channel attacks by balancing cell drive polarity
Abstract:
An electronic circuit includes a driving cell, one or more driven cells and one or more inverters. The driving cell has two or more inputs and at least one output and is configured to toggle the output between first and second logic states in response to the inputs. Each driven cell has two or more inputs, of which at least one input is configured to be driven by the output of the driving cell. The one or more inverters are placed in a signal network that connects the driving cell to the driven cells. The inverters are configured to balance, over the signal network, (i) a first capacitive load charged by electrical currents caused by transitions from the first logic state to the second logic state and (ii) a second capacitive load charged by electrical currents caused by transitions from the second logic state to the first logic state.
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