Mitigation of side-channel attacks using small-overhead random pre-charging

An electronic device includes a combinational logic circuit, one or more state-sampling components, and protection circuitry. The combinational logic circuit has one or more inputs and one or more outputs. The state-sampling components are configured to sample the outputs of the combinational logic...

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Bibliographic Details
Main Author Hershman, Ziv
Format Patent
LanguageEnglish
Published 29.12.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:An electronic device includes a combinational logic circuit, one or more state-sampling components, and protection circuitry. The combinational logic circuit has one or more inputs and one or more outputs. The state-sampling components are configured to sample the outputs of the combinational logic circuit at successive clock cycles. The protection circuitry is configured to protect the combinational logic circuit by, per clock cycle, starting to apply random data to the inputs of the combinational logic circuit a given time duration before a sampling time of the state-sampling components for that clock cycle, and, after applying the random data, switching to apply functional data to the inputs of the combinational logic circuit, to be sampled by the state-sampling components. A propagation delay, over any signal path via the combinational logic circuit, is no less than the given time duration.
Bibliography:Application Number: US201816194342