magore@watdcsu.UUCP (M.A.Gore - ICR) (07/25/86)
Serial numbers can be encrypted *WITH SOME OF THE CODE* in a way that makes removal non-trivial. Just taking two disks and comparing them is of little use if you DO NOT KNOW THE METHOD OF ENCRYPTION. While we're at it, why use only one method of encryption???? Making code copy detectable for any reasonable method does increase production costs though... Mike Gore, Institute of Computer Research.