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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi all,<br>
<br>
I am a master student in Artificial Intelligence, doing a thesis<br>
on privacy technologies, more precisely on traffic analysis resistance in the <br>
context of instant messaging.<br>
<br>
We am interested in developing a plug-in for IM clients to conceal the users <br>
communication profiles (how often users communicate and with whom) from the <br>
service provider.<br>
<br>
To achieve this, our strategy would be to have the IM client generate dummy <br>
messages and mix them with the real traffic, thus introducing noise in the <br>
communication profile observed by the service provider.<br>
Messages would be encrypted, as a first step to prevent the service from <br>
filtering out the dummy traffic. In a second step, real messages might also <br>
be made less distinguishable from dummy messages by slightly delaying them, in <br>
an attempt to conceal their timing patterns.<br>
<br>
Moreover, dummy messages could be sent to friends only or to both friends and <br>
random users. The former would conceal the actual "weights" in the <br>
communication profile while revealing the list of contacts; the latter would <br>
potentially allow to conceal the whole profile itself, both its weights and <br>
the list of friends.<br>
<br>
I am aware that this approach is not perfect and generates an excess in <br>
bandwidth, but the extra privacy and the compatibility with existing IM <br>
platforms might justify it.<br>
<br>
I was wondering:<br>
<br>
Would anybody be interested in using such system ?<br>
Do you know of a tool doing something similar already ?<br>
Do you have any comments or ideas?<br>
<br>
Any comments/feedback would be greatly appreciated.<br>
<br>
Best regards,<br>
<div><br>
<div style="font-family:Tahoma; font-size:13px"><font color="000080" face="Arial" size="2">Hugo Herter</font><br>
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