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amcrypt-ossl

Langue: en

Autres versions - même langue

Version: 10/04/2010 (fedora - 01/12/10)

Section: 8 (Commandes administrateur)

Sommaire

amcrypt-ossl - crypt program for Amanda symmetric data encryption using OpenSSL

Synopsis

amcrypt-ossl [-d]

DESCRIPTION

amcrypt-ossl

uses OpenSSL to encrypt and decrypt data. OpenSSL is available from www.openssl.org. OpenSSL offers a wide variety of cipher choices ( amcrypt-ossl defaults to 256-bit AES) and can use hardware cryptographic accelerators on several platforms.

amcrypt-ossl will search for the OpenSSL program in the following directories: /bin:/usr/bin:/usr/local/bin:/usr/ssl/bin:/usr/local/ssl/bin.

PASSPHRASE MANAGEMENT

amcrypt-ossl 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 only be recovered with the correct passphrase.

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 www.diceware.com) can be used to create passphrases that are difficult to guess and easy to remember.

FILES

/var/lib/amanda/.am_passphrase

File containing the pass phrase. It should not be readable by any user other than the Amanda user.

SEE ALSO

amanda(8), amanda.conf(5), openssl(1), amcrypt-ossl-asym(8)

The Amanda Wiki: : http://wiki.zmanda.com/

Author

Kevin Till <kevin.till@zmanda.com>

Zmanda, Inc. (FChttp://www.zmanda.comF[])

Notes

1.
www.openssl.org
http://www.openssl.org/
2.
www.diceware.com
http://www.diceware.com/
"Je me rappelle bien la splendeur de leurs bannières", reprit Elrond.
"Elle me rappelait la gloire des Jours Anciens et les armées de
Beleriand, où tant de grands princes et capitaines étaient assemblés.
Et pourtant pas tant, pas si beaux que lorsque Thangorodrim fut brisé
et que les Elfes pensèrent que le mal était fini à jamais, alors que
ce n'était pas vrai."
-- J.R.R. Tolkien, "La Communauté de l'Anneau"