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SSWAP(1)							      SSWAP(1)

NAME
       sswap - secure swap wiper (secure_deletion toolkit)

SYNOPSIS
       sswap [-f] [-l] [-l] [-v] [-z] swapdevice

DESCRIPTION
       sswap  is designed to delete data which may lie still on your swapspace
       in a secure manner which can not be recovered by thiefs,	 law  enforce‐
       ment  or	 other	threats.   The	wipe  algorythm	 is based on the paper
       "Secure Deletion of Data from Magnetic  and  Solid-State	 Memory"  pre‐
       sented  at  the	6th Usenix Security Symposium by Peter Gutmann, one of
       the leading civilian cryptographers.

       The secure data deletion process of sswap goes like this:

       *      1 pass with 0xff

       *      5 random passes. /dev/urandom is used for a secure RNG if avail‐
	      able.

       *      27 passes with special values defined by Peter Gutmann.

       *      5 random passes. /dev/urandom is used for a secure RNG if avail‐
	      able.

COMMANDLINE OPTIONS
       -f     fast (and insecure mode): no /dev/urandom, no synchronize mode.

       -l     lessens the security. Only two passes are written: one mode with
	      0xff and a final mode with random values.

       -l     -l  for  a  second time lessons the security even more: only one
	      pass with random values is written.

       -v     verbose mode

       -z     wipes the last write with zeros instead of random data

BEWARE
       swapoff
	      unmount your swapspace before using this	tool!  Otherwise  your
	      system might crash!

       BETA!  sswap  is	 still	beta.  It was only tested on Linux but on this
	      system it performed it's work all of the time.

BUGS
       No bugs. There was never a bug in the secure_deletion package (in  con‐
       trast to my other tools, whew, good luck ;-) Send me any that you find.
       Patches are nice too :)

AUTHOR
       van Hauser / THC <vh@thc.org>

DISTRIBUTION
       The newest version of the secure_deletion package can be obtained  from
       http://www.thc.org

       sswap  and the secure_deletion package is (C) 1997-2003 by van Hauser /
       THC (vh@thc.org)

       This program is free software; you can redistribute it and/or modify it
       under  the  terms of the GNU General Public License as published by the
       Free Software Foundation; Version 2.

       This program is distributed in the hope that it	will  be  useful,  but
       WITHOUT	ANY  WARRANTY;	without	 even  the  implied  warranty  of MER‐
       CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the  GNU  General
       Public License for more details.

SEE ALSO
       srm (1), sfill (1), smem (1)

								      SSWAP(1)

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