[p2p-hackers] Error correcting codes to prevent failurein BitTorrent like systems?

[Arnaud Legout]

Hi,

Enzo Michelangeli wrote:
> Sometimes particular blocks are not missing, but mangled in transit by NAT
> routers too smart for their own good (and their owners', among which, at
> one time, myself). 
You do not target the same problem. It is far more easy to define your 
redundancy parameters to
 correct x% of corruption than to solve a distributed piece selection 
problem.
Moreover, corrupted pieces cannot be replicated in a torrent because 
your have a hash for each piece.
Therefore, I do not see how you can stop at 99% of the download because 
some pieces are corrupted. In this case,
the piece is simply retransmitted, which increases slightly the download 
time. By no way it should compromise a torrent
or create a last pieces problem.

Arnaud.