> Sure, but they do it following a certain process. Which is going to include checking that it doesn't match any OS files. > You can try as often as you want

> Sure, but they do it following a certain process. Which is going to include checking that it doesn't match any OS files. > You can try as often as you want and analyzing the updated signatures you even get some feedback about your attempts. As others said, probably only if you can reverse a hash function.