https://www.bleepingcomputer.com/news/security/ten-notorious-ransomware-strains-put-to-the-encryption-speed-test/ > Researchers have conducted a technical experiment, testing ten ransomware variants to determine how fast they encrypt files and evaluate how feasible it would be to timely respond to their attacks. > Ransomware is malware that enumerates the files and directories on a compromised machine, selects valid encryption targets, and then encrypts the data, so it is unavailable without a corresponding decryption key.