Why are you encrypting the files and not the filesystem and the channel? On Tue, Oct 13, 2015 at 6:54 PM, Xen <l...@xenhideout.nl> wrote: > Hi Folks, > > I was wondering if I could ask this question here. > > Initially when I was thinking up how to do this I was expecting block > encryption to stay consistent from one 'encryption run' to the next, but I > found out later that most schemes randomize the result by injecting a random > block or seed at the beginning and basing all other encrypted data on that. > > In order to prevent plaintext attacks I guess (the block at the beginning of > many formats is always the same?) and also to prevent an attacker from > learning the key based on multiple encryptions using the same key. > > However the downside is that any optimization scheme is rendered useless, > such as rsync's. > > What is a best practice for this, if any? > > My backup software that I'm currently using, I'm on Windows, does encryption > but since it has the key, it can create differentials/incrementals so the > whole image does not need to be retransferred. If it works, but that's > another story. > > Still, differentials and incrementals are all fine (grandfather, father, > son) but updating the/a main full image file itself would perhaps be much > more efficient still. > > For some reason my host and rsync on Windows are rather slow, I get some > 500K/s upload for a 20GB file. Which takes, kinda long. > > I might start splitting the files in lower gigabyte chunks as well, though. > > Currently sending it to another host at 1MB/s which rsyncs it to the real > target where I'm less concerned about how long it takes. > > But I'm sending it over with scp (pscp) because for some reason rsync is > also rather slow here (maybe it's my computer). > Scp has no partial option (how silly) but I can just rsync if it fails. > > Still, I wonder how other people are doing this, if they do something like > this. > > Regards, > > Xen. > > > -- > Please use reply-all for most replies to avoid omitting the mailing list. > To unsubscribe or change options: > https://lists.samba.org/mailman/listinfo/rsync > Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
-- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
