The CryptoLocker ransomware is as simple as it is devastating: Once it worms its way onto your system, it encrypts all of your precious files using strong AES-256-bit cryptography, which is virtually impossible to break if you don’t know the private key (read: secret code) required to unlock it. Pay the attackers $300, and they’ll give you the key. Don’t pay, and your files stay scrambled forever.
