Exam CISSP topic 1 question 202 discussion

Simple power analysis is a method of side-channel attack that examines a chip's current consumption over a period of time

Answer C) https://en.wikipedia.org/wiki/Power_analysis#:~:text=Variations%20in%20power%20consumption%20occur%20as%20the%20device%20performs%20different%20operations.

In a Simple Power Analysis (SPA) attack, an attacker measures the power consumption of a device while it's performing cryptographic operations to obtain sensitive information such as encryption keys. The attacker directly observes the power consumption levels of the device to extract this data. The key in the question is the word "directly". While key generation may be observed, it is not observed as directly as power consumption

C is correct

A Simple Power Analysis (SPA) attack against a device directly observes the consumption of power. (Option C)

A Simple Power Analysis (SPA) attack directly observes consumption. SPA is a type of side-channel attack that involves analyzing the power consumption of a device to extract sensitive information, such as encryption keys. By measuring the power consumption of a device as it performs various operations, an attacker can deduce the data being processed by the device and potentially gain access to sensitive information.

Consumption

consumption

Power analysis observes consumption, so c

C - Consumption. https://en.wikipedia.org/wiki/Power_analysis