Keystroke logging, often referred to as "keylogging," is the process of recording the keys struck on a keyboard, typically in a covert manner so that the person using the keyboard is unaware their actions are being monitored. This technique is commonly used in cybersecurity contexts, both for legitimate purposes such as troubleshooting, user behavior analysis, or employee monitoring and for malicious activities, including unauthorized data collection and identity theft. Keyloggers can be implemented through software, hardware devices, or firmware, and are capable of capturing sensitive information like passwords, credit card numbers, and personal messages.