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> 
> Why? If the first 4096 bytes contains headers, then the node could send that
> back without decrypting it. The client could then decrypt those 256 blocks
> (given a 128 bit block cipher) without any need for the rest of the data.
> 
> And if you use CBC you could even send the meta-data alone even if it were not
> at the beginning, all you need is one block of the data that precedes it to 
> use
> as an IV. What is the problem?

Oh I totally agree.  I was just playing devils advocate on C.  I
definitely think the headers should be at the front.  We need to be able
to do header-only requests, and placing any encrypt/decrypt burden on the
node itself is not the Right Thing(tm).

        Scott


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