Good encryption (Score 1)

When you use full disk encryption only the crypt header reveals your using it. Using: cryptsetup luksDump /dev/device You can get the length of the header to make a backup: dd if=/dev/device of=./backupfile count=length Then you can overwrite it with: dd if=/dev/urandom of=/dev/device Now your disk cannot be recognized as encrypted, storing the cryptheader on a micro-SD card allows you to quickly eat it when necessary. You can also carry a very strong magnet Neodymium magnet, this allows you to wipe your harddrive in a second.