> A baseline hash is computed at game start, and periodic re-hashes are compared against the baseline. In 2015, Apple briefly used this “hall monitor” techniqu

> A baseline hash is computed at game start, and periodic re-hashes are compared against the baseline. In 2015, Apple briefly used this “hall monitor” technique for iOS 9 [0] but abandoned it when they learned that the whole approach is fundamentally flawed. Looks like anti-cheat developers reinvented this old trick even though it doesn’t work. [0]: https://xerub.github.io/ios/kpp/2017/04/13/tick-tock.html https://xerub.github.io/ios/kpp/2017/04/13/tick-tock.html