What is the most accurate definition of a software keylogger?

A software keylogger is best defined as a program that monitors keyboard strokes. This definition captures the essential function of a keylogger, which is to track and record every key the user presses on their keyboard. Keyloggers can be used for various purposes, including legitimate applications for monitoring employee activity or capturing user behavior for analysis. However, they are often associated with malicious intent, as they can capture sensitive information such as passwords, personal identification numbers, and credit card information without the user's consent or knowledge.

The other options do not accurately describe what a software keylogger does. While option B mentions suspicious software, it is too vague and does not specifically highlight the primary function of a keylogger, which is the monitoring of keystrokes. Option C refers to self-replicating programs, which describes a computer virus or worm rather than a keylogger. Option D describes a type of software that appears beneficial but has hidden harmful effects, which is more aligned with concepts like Trojan horses or malware, rather than the specific function of capturing keyboard input that defines a keylogger.