What is RansomWare?
Ransomware is a type of malicious software that blocks access to the victim's data or threatens to publish or delete it until a ransom is paid.
While some simple ransomware may lock the system in a way which is not difficult for a knowledgeable person to reverse, more advanced malware uses a technique called cryptoviral extortion, in which it encrypts the victim's files, making them inaccessible, and demands a ransom payment to decrypt them.