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In modern integrated circuits design, security is a significant concern due to power analysis based side-channel attacks. Various countermeasures such as hiding and masking have limitations, for example, performance degradation, power consumption, low scalability, and area overhead. Besides, these countermeasures cannot detect attacks and alert users to take protective steps against attack. A power side-channel attack (P-SCA) detection system is proposed in this paper through battery impedance monitoring. Due to malicious probing, a non-typical impedance change occurs in the battery. Therefore, our system monitors the battery impedance change to detect such attacks. The detection circuit consists of a 10 bit ADC, an S8050 NPN transistor, a 1N4007 diode, and sense resistors (10 Ω, 50 Ω, 1k Ω). The detection system is designed in an Arduino. Measurements show that the system can detect a P-SCA in 22.020 ms, which is well within the desired detection window. The desired detection windows for different sense resistor values are measured as well. The accuracy and power consumption of implementation are also analyzed.Index Terms-Power side channel attack (P-SCA), Correlation power analysis (CPA), intruder detection, Advanced encryption standard (AES).
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