[Box Backup-dev] Re: [Box Backup] bbackupd - read errors on database files

[Chris Wilson]

Hi Gary,

On Tue, 10 Apr 2007, G. wrote:

> I don't think that's the way to go. MD5s not only provide enhanced 
> change detection, but also remote store content verification on every 
> backup cycle.

I'm afraid not, that's a different problem. We would store checksums of 
the raw data, not the encrypted data, and so it would have to be 
downloaded and decrypted by the client (just like compare -a) to verify it 
properly. Since this is what compare -a already does, there would be no 
benefit here.

Checksums of the encrypted data have been discussed, but that would 
require new commands on the server to return the IV and checksum of each 
block, which is more complex again.

Cheers, Chris.
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