Using a pogoplug with archlinux i am creating a backup server for my data. What i would like to do is put the server on a other site and backup over the internet using ssh and rsync.

On the backup server i created a encrypted patition using Luks for my data. Now i need to automaticaly mount the encrypted partition when i logon using ssh. This is working with pam_mount. But for pam_mount the password of the user on the backup server (also used by ssh) needs to be the same as the passphrase of the encrypted disk. But i would like to cron a backup script, so entering a password when executing the script is not an option.

Connecting using ssh with public/private key authentication the password is not entered when connecting so pam_mount cannot mount the encrypted disk :-(

How can i use key pair authentication and automount an encrypted disk ?

Best regards,

Nyko

I use encfs (available in most distributions) for this identical scenario. This allows me to rsync the encrypted files, without needing to decrypt them.

macemoneta,

That's even better. That way there is no decrypted data on the backup server which is pretty secure in my opinion. On the backup server i do not need the decrypted data so i am happy.

Thank you very much.