--- Toad <[EMAIL PROTECTED]> wrote:

> On Tue, Aug 17, 2004 at 12:23:54PM +0200, Newsbyte
> wrote:
> > "That's mathematically impossible. If the node
> knows what's in the store
> > (and it needs to to function), then the operator
> can find out."
> > 
> > Reasonably effort, in the view of the courts, is a
> lot less dificult to reach, luckily. For most users,
> hacking, reverse engineering etc. is deemed beyond
> reasonable effort. If you make it difficult enough
> that Mr.Riaa can't come up with an easy tool, you've
> basically won the ballgame in this respect.
> 
> The problem is, they can.
How about this.  When a key is inserted, instead of
sending the entire key Z to node X, you split the key
Z by extracting every Nth bit and sending it to node Y
as key Z2 with the remainder key Z1 going on to node
X.  Now to retrieve the key you have to get two keys
(Z1 and Z2) plus metadata so you know how to put them
together to get the desired key Z.  Now there are
obvious drawbacks to this, but a couple advantages
are:

1) Your node MUST connect to other nodes in order to
function.
2) It is easy to arrange things so that no single node
could have both the Z1 and Z2 data to make the whole Z
key, therefore it's impossible to have an illegal key
in your store because all of the keys are incomplete
(assuming N isn't too large).

I believe fixed key sizes with transparent FEC could
accomplish this, at least for keys larger than the
fixed key size.  You would need some method to make
sure no node would contain enough FEC blocks to
reconstitue the key.

> -- 
> Matthew J Toseland - [EMAIL PROTECTED]
> Freenet Project Official Codemonkey -
> http://freenetproject.org/
> ICTHUS - Nothing is impossible. Our Boss says so.
> 

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