Re: [Blocks-development] Readvertising local files

[Tod D. I. <to...@je...>]

Amazing what one email message can do. :)

 Tod.

ps.
 I have set up a blocks server at jesus-crispie.com:8017. Its been set to
launch on boot, 1 GB cache (until I get another HD, which will be at least
1-2 more months). It'll be permenant as long as blocks is in use.

On Sat, May 12, 2001 at 07:34:15PM +0000, Blat Froop wrote:
> >From: Luke Hankins <lu...@et...>
> >To: Blat Froop <pet...@ho...>
> >CC: blo...@li...
> >Subject: Re: [Blocks-development] Life Signs
> >Date: Sat, 12 May 2001 14:15:10 -0400
> >
> > > * If you disconnect and reconnect to a Blocks server it
> > > will only send you adverts for files that are available
> > > remotely, not for files it has within its own disk cache.
> > > This is to prevent scanners traversing the Blocks
> > > network and examining the files stored in each node.
> > > This means that the only way snoopers can associate a
> > > file with a particular Blocks server IP is to be directly
> > > connected to that server at the point the file was
> > > uploaded or cached.
> >
> >I _think_ that this problem can be solved by simply never advertising to 
> >your neighbors that you have a block.  Instead, make up a few "loopback 
> >links" that point back to yourself and then use them to pad out messages to 
> >at least 3 hops.
> >
> >This would prevent people who were directly connected to you from finding 
> >out what you've got in your cache.  (I think.  I haven't had time to check 
> >it out, but I think there would be a way for someone to connect to you with 
> >three different clients and compare what routes you were advertising to get 
> >more info.)
> >
> >It's a simple concept, but hard to explain without pictures.  Should I draw 
> >some?
> 
> I think Ive got the idea (tell me if i dont).
> 
> I think the same effect could be achieved by simply
> prefixing a small number (0,1 or 2) bogus routing
> chars to the route when readvertising locally cached
> files. Since Blocks servers will reply
> out of cache if they have the block, the request
> should never be sent to the bogus routes unless the
> block fell out of cache. It might make invalidating
> bogus routes more difficult tho.
> 
> ttfn
> 
> PG.
> 
> PS Good to see the list coming back to life :-)
> 
> 
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-- 

 * All opinions expressed herein belong to Me. Tod D. Ihde. So there. *   
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