Preventing Data Extraction by Side-Channel Attack
First Claim
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1. A method for data transfer, comprising:
- receiving a control signal triggering a transfer of a secret value into an element of a circuit; and
in response to the control signal, inserting a deterministic, non-constant dummy value and the secret value in succession into the element of the circuit.
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Abstract
A method for data transfer includes receiving a control signal triggering a transfer of a secret value into an element (24) of a circuit (20). In response to the control signal, a dummy value (42, 50) and the secret value are inserted in succession into the element of the circuit.
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Citations
12 Claims
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1. A method for data transfer, comprising:
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receiving a control signal triggering a transfer of a secret value into an element of a circuit; and in response to the control signal, inserting a deterministic, non-constant dummy value and the secret value in succession into the element of the circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electronic device, comprising:
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a secret data source, configured to provide a secret value; a dummy data generator, configured to generate deterministic, non-constant dummy values; a circuit element, which is configured to receive data values; and a switching element, which is configured, in response to a control signal triggering a transfer of the secret value into the circuit element, to successively insert a deterministic, non-constant dummy value from the dummy data generator and the secret value from the secret data source into the circuit element. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification