Mathewson said that the group is working on methods for alleviating the problems that national-level restrictions cause for Tor users. One method involves moving to a modular transport method in order to get around some of the throttling that ISPs perform on encrypted traffic in order to make Tor usage more difficult.
In a separate talk at LEET, Stevens LeBlond of INRIA in France presented research on methods for tracing Tor users back to their IP address. One of the attacks, which LeBlond and his co-authors titled "Bad Apple," used an exit node that the researchers controlled in order to trace the streams of data sent by users of BitTorrent over Tor back to their IP addresses."
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