sswap.1

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.TH SSWAP 1

.SH NAME
sswap \- secure swap wiper (secure_deletion toolkit)

.SH SYNOPSIS
.B sswap [-f] [-l] [-l] [-v] [-z] swapdevice

.SH DESCRIPTION
.I 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 enforcement
or other threats.
The wipe algorythm 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.
.PP
The
.I secure data deletion
process of sswap goes like this:
.PP
.TP
.B *
1 pass with 0xff
.TP
.B * 
5 random passes. /dev/urandom is used for a secure RNG if available.
.TP
.B * 
27 passes with special values defined by Peter Gutmann.
.TP
.B * 
5 random passes. /dev/urandom is used for a secure RNG if available.
.PP

.SH COMMANDLINE OPTIONS
.PP
.TP
.B \-f
fast (and insecure mode): no /dev/urandom, no synchronize mode.
.TP
.B \-l 
lessens the security. Only two passes are written: one mode with 0xff and
a final mode with random values.
.TP
.B \-l
-l for a second time lessons the security even more: only one pass with
random values is written.
.TP
.B \-v
verbose mode
.TP
.B \-z
wipes the last write with zeros instead of random data
.PP

.SH BEWARE
.TP
.B swapoff
unmount your swapspace before using this tool! Otherwise your system might
crash!
.TP
.B BETA!
.I sswap
is still beta. It was only tested on Linux but on this system it performed
it's work all of the time.

.PP
.SH 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 :)

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

.SH DISTRIBUTION
The newest version of the
.I secure_deletion package
can be obtained from 
.I http://www.thc.org
.Sp
.I sswap
and the
.I secure_deletion package
is (C) 1997-2003 by van Hauser / THC (vh@thc.org)
.Sp
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.
.Sp
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.

.SH SEE ALSO
.I srm
(1),
.I sfill
(1),
.I sdmem
(1)