One other area where is is useful is when you are in a jurisdiction
where a court order may require you to produce your encryption keys -
yes such jurisdictions exist and I don't want to debate the "human
rights" angle or social engineering aspects of this just state that it
exists.
For such environments you may not want to use encryption, because you
could be forced to give up your key, or even if you are you want a
background method of destroying the cipher text without doing full disk
destruction.
Think of court cases between companies rather than criminal activity.
--
Darren J Moffat
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