Meanings of key logger in English

When he downloaded the PDF, what he downloaded was the key logger.

What he downloaded was the key logger.

But because it was actually a key logger, that means it was a program that executed and ran an application.

Key loggers are a pretty common way to access information from an individual.

Enter key loggers designed to circumvent encryption by capturing keystrokes as a surveillance target typed, before encryption kicked in.

Hackers can use the compromised profiles to host Trojan horses such as key loggers that go on to steal banking passwords and credit card numbers.