<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Could this be applied to TOR? Here is the abstract. "A method of detecting an intermediary communication device in a
communication path of a target communication device by inserting a sensor
in the path, recording communication packets to and from the target
communication device, recording times for the packets, identifying
packets in a first interconnection layer, calculating a minimum latency
time for the packets, identify packets in a second interconnection layer
that is at a different communication processing level than that of the
first interconnection layer, calculating a minimum latency time for the
packets of the second interconnection layer, and determining that an
intermediary communication device is present in the path if an absolute
difference between the minimum latency times is above a user-definable
threshold."</td></tr></table><br>