An acronym for keystroke logger, 'keylogger', is a type of ______ that monitors and records what you type on your computer or mobile phone.

A keylogger secretly monitors and records everything typed, which makes it a form of spyware.

A worm self-replicates and spreads through networks rather than logging keystrokes.

A virus attaches to files and needs a host program to spread its damage.

A trojan horse hides malicious code inside an apparently useful program.

Keyloggers are often used to steal passwords and other typed credentials.

Spyware as a whole gathers information about a user without consent.