People ask about making an 'obfuscated' version of BitTorrent often enough that it ought to be a FAQ. The reason given is that some ISPs are doing traffic shaping on BitTorrent protocol, and people wish to get around that.
There are several whole categories of reasons for not doing it. First, there's hardly any benefit. Most ISPs don't do such shaping, and attempts at obfuscation won't work for long - the ISP traffic shaping tools are already quite sophisticated, and a wire protocol which transfers a lot of data bidirectionally and consistently looks like line noise with no header is only marginally more difficult to identify then one which uses fixed ports. Obfuscating the protocol doesn't even claim to make it difficult to find out who's downloading a particular file.... More
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