Scrub free disk blocks

[Bruno Wolff III]

On Sat, Aug 28, 2010 at 17:32:34 -0700,
  James McKenzie <jjmckenzie51 at earthlink.net> wrote:
> One thing is that if you expect the police on your doorstop, you are 
> screwed anyway.  There is NO truly secure method, other than complete 
> pulverization, to destroy disk data. 

That depends on how good they are. Full disk encryption can prevent access
if they power your machine down without taking measures to copy what is
in memory (to retrieve the disk keys). A dead man system can deal with
leaving it powered up for too long.

If you are running a gambling operation or the like and can afford to have
a trusted person available at all times to react to a raid, you can arrange
for memory to be cleared in a very short period of time. You should have
enough time even in a no knock raid.