Then you would need to check every app on the phone against some server. Your assumption on how it works is flawed to begin with. Check the comment from one of

Then you would need to check every app on the phone against some server. Your assumption on how it works is flawed to begin with. Check the comment from one of the original authors https://news.ycombinator.com/item?id=35003844 https://news.ycombinator.com/item?id=35003844