sswap

SSWAP(1) General Commands Manual 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 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 cryp‐
   tographers.

   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.