Ransomware is a type of malicious software from cryptovirology that threatens to publish the victim's data or perpetually block access to it unless 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.
It is called cryptoviral extortion and it was inspired by the fictional facehugger in the movie Alien.
However, one high-profile example, the "Wanna Cry worm", traveled automatically between computers without user interaction.
Starting from around 2012 the use of ransomware scams has grown internationally.
This money collection method is a key feature of ransomware.
In the von Solms-Naccache scenario a newspaper publication was used (since bitcoin ledgers did not exist at the time the paper was written).