1 .\" Title: amcrypt-ossl
2 .\" Author: Kevin Till <kevin.till@zmanda.com>
3 .\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
5 .\" Manual: System Administration Commands
6 .\" Source: Amanda 2.6.1
9 .TH "AMCRYPT\-OSSL" "8" "01/22/2009" "Amanda 2\&.6\&.1" "System Administration Commands"
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170 amcrypt-ossl \- crypt program for \fIAmanda\fR symmetric data encryption using OpenSSL
173 .HP \w'\fBamcrypt\-ossl\fR\ 'u
174 \fBamcrypt\-ossl\fR [\-d]
182 to encrypt and decrypt data\&. OpenSSL is available from
183 www\&.openssl\&.org\&. OpenSSL offers a wide variety of cipher choices (
185 defaults to 256\-bit AES) and can use hardware cryptographic accelerators on several platforms\&.
189 will search for the OpenSSL program in the following directories: /bin:/usr/bin:/usr/local/bin:/usr/ssl/bin:/usr/local/ssl/bin\&.
190 .SH "PASSPHRASE MANAGEMENT"
194 uses the same pass phrase to encrypt and decrypt data\&. It is very important to store and protect the pass phrase properly\&. Encrypted backup data can
196 be recovered with the correct passphrase\&.
198 OpenSSL\'s key derivation routines use a salt to guard against dictionary attacks on the pass phrase; still it is important to pick a pass phrase that is hard to guess\&. The Diceware method (see
199 www\&.diceware\&.com) can be used to create passphrases that are difficult to guess and easy to remember\&.
202 /var/lib/amanda/\&.am_passphrase
204 File containing the pass phrase\&. It should not be readable by any user other than the
212 \fBamanda.conf\fR(5),
214 \fBamcrypt-ossl-asym\fR(8),
215 : http://wiki.zmanda.com
218 \fBKevin Till\fR <\&kevin\&.till@zmanda\&.com\&>
220 Zmanda, Inc\&. (\FChttp://www\&.zmanda\&.com\F[])
226 \%http://www.openssl.org/
231 \%http://www.diceware.com/