I'm taking a computer forensics class, and the professor is an active policeman who does computer forensics. They make a lot of use of hashes in computer foren

I'm taking a computer forensics class, and the professor is an active policeman who does computer forensics. They make a lot of use of hashes in computer forensics - they use hashes to determine if evidence has been tampered with. He's spoken about this - he's aware of the possibility of hash collisions, but he does not believe anyone could practically use them in a real attack.