'True Military' nuking
======================

This option can be safely ignored by most users. It may be useful to you
only if you are extremely paranoid about security and/or if you need to
protect sensitive data against the most serious types of attack.

When using either of the applications !LockMail or !OpenMail inside
!Mail-Lock, certain files which might reveal sensitive information are
securely wiped with 'military' security (by default, using the '-m' option
of Sergio Monesi's Nuke).

It may seem surprising that it is important to destroy sensitive data when
using !OpenMail, whose purpose is to restore the data. The reason for
securely wiping certain files in this case is to protect the pass phrase.

The use of Nuke's '-m' option is extremely secure for all ordinary purposes
and is likely to prevent even expert hackers from recovering any data.

However, there is reason to believe that highly sensitive disc recovery
equipment, such as that used by government intelligence services, may be
capable of recovering even data that has been overwritten many times on a
disc. In order to provide the highest possible wiping security, !Mail-Lock
can make use of Nuke's 'True Military' (-M) option, which overwrites the
relevant disc sectors 35 times with certain specially designed patterns.

'True Military' nuking can be much slower than the ordinary 'military' mode
used by default in !Mail-Lock, especially for very large mail folders, and
it is therefore recommended that it be used only in exceptional
circumstances. If you really need to use it, this can be done as follows:

When you run !LockMail or !OpenMail, you are asked to specify a secure mail
folder. To select the 'True Military' option, you must type "M" (followed by
<Return>) at that point. (Note that this must be a *capital* "M".) The
program will then ask you once again to specify a secure mail folder.    

Note that the 'True Military' mode is used only in one particular operation
of !LockMail or !OpenMail. !Mail-Lock will automatically revert to the
default 'military' mode after completing the operation. If you want to use
the 'True Military' option again, you must specify it again next time.