### Comment:
What are some popular types of ransomware and how do they work?

### REPLY:
Some popular types of ransomware include WannaCry, Locky, and CryptoLocker. These types of malware typically spread through malicious email attachments or exploit kits. Once infected, the ransomware encrypts the victim's files using a strong encryption algorithm, rendering them inaccessible. The attackers then demand a ransom, usually in cryptocurrency, in exchange for the decryption key to unlock the files.