Which type of malware encrypts the victim's files and demands payment for the decryption key?
Q1. Which type of malware encrypts the victim's files and demands payment for the decryption key?
Answer: Ransomware
Explanation: Ransomware is malware that encrypts the victim's files or locks their system, then demands a ransom payment (usually in cryptocurrency) to restore access. Notable examples include WannaCry and CryptoLocker.