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 thieves, law enforcement or other threats.  The wipe algorithm  is  based  on  the  paper
       "Secure  Deletion  of  Data  from  Magnetic  and Solid-State Memory" presented 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 available.

       *      27 passes with special values defined by Peter Gutmann.

       *      5 random passes. /dev/urandom is used for a secure RNG if available.

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 contrast 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 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  General  Public
       License for more details.

SEE ALSO

       srm (1), sfill (1), sdmem (1)

                                                                                                        SSWAP(1)