Date: Sat, 29 Dec 2001 13:25:39 -0500 (EST) From: Francisco Reyes <lists@natserv.com> To: Randy Bush <randy@psg.com> Cc: freebsd-security@FreeBSD.ORG Subject: Re: crypted remote backup Message-ID: <20011229132149.M32484-100000@zoraida.natserv.net> In-Reply-To: <E168Qts-000Bj5-00@rip.psg.com>
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On Mon, 26 Nov 2001, Randy Bush wrote: > i want to back up some large files over the net, like 40gb. i want to do > something like rsync. but i want the data crypted not only as it passes > over the net (rsync over ssh), but also as it resides on the remote disk. > any recommended practice on this? > randy Although I have not worked on it yet, I have been thinking on the topic for a few months. I don't think that the rsync algorithm is going to work. I don't know of any program which can sync/encrypt and the same time. This implies you would have to encrypt and then sync. My, very little, understanding of encryption is that any change in the file would cause large changes on the encrypted files. if that was the case the overhead of trying to sync files which have changed a lot may be larger than just copying them over. Do you have lots of files or few large files? If you had numerous files you could try keeping a second copy of the files in encrypted mode. Daily encrypt files which have changed and then sync encrypted files from source machine to target machine. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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