Re: [Burp-users] Encryption and dedup
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From: Saint G. <sai...@gm...> - 2013-05-25 10:41:02
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On Saturday, 25 May 2013, Graham Keeling <ke...@sp...> wrote: > On Fri, May 24, 2013 at 12:34:00PM +0200, Saint Germain wrote: >> Hello, >> >> If we activate the encryption (client side) for several clients, I >> understand that the delta differencing is not working anymore. >> If we use a different key for each client, I suppose that the >> deduplication will not work anymore. >> But what if we use the same key for each client ? Will the deduplication work ? >> >> It is in the context of a local backup with rsync to a remote server >> where I don't trust the remote server (because server security is >> difficult to maintain). I have thought about several other schemes >> (rsyncing to EncFS for instance) but I haven't found a better solution >> than asking Burp to encrypt . The downside is that my local backup is >> also encrypted. Maybe someone may have a better idea ? > > I haven't tried it, but you could have the local backups going onto an > encfs partition, and then rsync the encrypted encfs directory remotely. > That means that you can see the files unencrypted on the local server (so bedup > will work) but the remote server only sees encrypted files, and you don't have > to configure encryption on each of the clients. > The offsite rsync will probably not be efficient because changed files will > change completely, but I am not sure that there is anything you can do about > that anyway. > Hum I haven't thought about that. The drawbacks would be that I cannot use your nice offsite backup script and that I may not have the guarantee that the offsite backup is working at any time (if the rsync is not finished). I guess that I will have to try and see what happened. I will let you know the result of my experiences ! Thanks for the idea ! |