Re: What an interesting idea. A key that will turn the encrypted file into a of anything
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2. Key2: Silently destroys the data, or replaces it ...
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Won't work. The first step in computer forensics is to make an exact raw sector image (clone) of the suspect's HDD using an imaging system that will not allow any write operation to the evidential drive. Then the original HDD is sealed in an evidence bag and not touched again (unless the evidence is disputed by the defence). That clone is designated the "master clone" and is never worked upon. The forensics guys get clones of that clone to work on. Any process that changes the data on the drive will be instantly spotted by comparing to the master clone, and of course the original data trivially recovered by cloning it again.