Re: Potential DoS on Bittorrent

From: anthonyberet (nospam_at_me.invalid)
Date: 08/28/05 

Date: Sun, 28 Aug 2005 10:13:51 +0100

Twisted One wrote:
> Stephen Sprunk wrote:
>
>> Same for the one I'm reading, at least in the .torrent file. Perhaps
>> once a
>> piece is started, the sender directly transmits hashes of the
>> subpieces to
>> the receiver? See below on why I think this may happen.
>
>
> This would suck. If we assume the sender of subpieces is untrusted, then
> the hash they send is untrusted. It will match the data, even if the
> data is bogus and the big piece will hash-fail, just so they can't be
> fingered as the bad node, and so the downloader has to get the whole
> piece again and not just the bad subpiece.
>
Tut! - the HASH is in the .torrent file, which are usually to be trusted.

Relevant Pages

  • Re: Potential DoS on Bittorrent
    ... > Same for the one I'm reading, at least in the .torrent file. ... the sender directly transmits hashes of the subpieces to ... If we assume the sender of subpieces is untrusted, ... "One ring to rule them all, ...
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  • Re: Potential DoS on Bittorrent
    ... >> Same for the one I'm reading, at least in the .torrent file. ... the sender directly transmits hashes of the ... If we assume the sender of subpieces is untrusted, ... You get hash information from the "trusted" tracker... ...
    (sci.crypt)
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