Taking hostages for ransom has become highly prevalent across the globe. For example, there have been several recent instances of armed bandits abducting schoolchildren in northern Nigeria. Kidnappings have also frequently occurred in other places, such as American journalist James Foley's kidnapping by by ISIS, which demanded a large ransom for his release. In recent years there has also been a proliferation of ransomware, computer malware by which hackers freeze access to data (for individuals, hospitals, schools, local governments, etc.) and demand payment in exchange for giving back access to that data. Such ransomware has recently been used by Russian-state backed hackers to ascertain leverage on Ukraine and by Chinese nationalists to target Tibetans.