The correct answer is Spyware.SpywareSpyware is an unwanted software that infiltrates your computing device and steals your internet usage data and sensitive information.Spyware describes software with malicious behavior that aims to gather information about a person or organization and send such information to another entity in a way that harms the user.Websites may engage in spyware behaviors like web tracking.Some types of spyware can install additional software and change the settings on your device so it's important to use secure passwords and keep your devices updated.Additional InformationRansomwareRansomware is a form of malware that encrypts a victim's files.It encrypts the victim's files, making them inaccessible, and demands a ransom payment to decrypt them.Ransomware attacks are typically carried out using a Trojan disguised as a legitimate file that the user is tricked into downloading or opening when it arrives as an email attachment.Ransomware is considered "scareware" as it forces users to pay a fee (or ransom) by scaring or intimidating them.TrojanA trojan is any malware that misleads users of its true intent.A trojan is generally spread by some form of social engineering.Trojans may allow an attacker to access a user's personal identity.It can also delete user's files or infect other devices connected to the network.Key loggerA software-based keylogger is a computer program designed to record any input from the keyboard.Key loggers are used in IT organizations to troubleshoot technical problems with computers and business networks.Individuals can use malicious keyloggers on public computers to steal passwords or credit card information.Most key loggers are not stopped by HTTPS encryption because it only protects data in transit between computers.