Here's the scenario I'm trying to solve:In my application, users provide files to other users.I want to provide a way of verifying that files have not been tampered with.I wonder if this means some sort of third party, independent online data store of file signatures can be referenced to ensure all is OK.I don't know much about this, what's a good way to do it?
How to verify that a file has not been tampered with?
security