Passcode Why ransomware is spreading, and how to guard against digital hijackers

Ransomware is malware that encrypts victims' data until they pay up. A popular variety known as CryptoWall has infected an estimated 1 million victims and collected approximately $1.8 million in ransom.

Dell Secureworks

The first sign of trouble is usually a message like this: "All of your files were protected by a strong encryption  ... . You will not be able to work with them, read them or see them, it is the same thing as losing them forever."