Voltage Glitch Attack Detector
AssigneeNuvoton Technology Corporation
InventorsYuval Kirschner, Tamir Golan
Life of this patent
Estimating the term…
Abstract
An electronic device includes a power-supply input, a protected circuit and a voltage sense circuit, The protected circuit is configured to draw current from the power-supply input, thereby obtaining from the power-supply input an operational voltage waveform. The voltage sense circuit is configured to receive, from the power-supply input, a sense voltage waveform that differs from the operational voltage waveform, via a second electrical connection that is separate from the first electrical connection, and to detect a security attack on the protected circuit responsively to the sense voltage waveform.
Claims10
An electronic device, comprising:
- a power-supply input;
- a protected circuit, configured to draw current from the power-supply input, thereby obtaining from the power-supply input an operational voltage waveform;
- and
- a voltage sense circuit, configured to receive, from the power-supply input, a sense voltage waveform that differs from the operational voltage waveform, via a second electrical connection that is separate from the first electrical connection, and to detect a security attack on the protected circuit responsively to the sense voltage waveform.
A method, comprising:
- in a protected circuit in an electronic device, drawing current from a power-supply input, thereby obtaining from the power-supply input an operational voltage waveform;
- and
- in a voltage sense circuit in the electronic device, receiving from the power-supply input a sense voltage waveform that differs from the operational voltage waveform, via a second electrical connection that is separate from the first electrical connection, and detecting a security attack on the protected circuit responsively to the sense voltage waveform.
Dependencies are inferred from the claim text.