----- Forwarded message from [EMAIL PROTECTED] ----- From: [EMAIL PROTECTED] Date: Wed, 08 Dec 2004 19:42:50 -0500 To: [EMAIL PROTECTED] Subject: [p2p-hackers] Automatic reputation systems for P2P security? X-mailer: Pegasus Mail for Windows (v4.12a) Reply-To: "Peer-to-peer development." <[EMAIL PROTECTED]>
I've seen several papers referencing advogato, among other things, and it seems like reputation/trust systems solve a lot of problems related to P2P misbehavior. For instance, clients can track other clients that send out bogus files, that report a file and then refuse to share it, that create bogus queueing data (big problem with Emule/Edonkey networks), that might outright lie or otherwise cheat/steal and attempt to disrupt a Chord network, etc. It seems that scalar trust systems aren't going to do it because it is fairly easy to cheat by creating fake nodes, etc. So the real trick is the "group" or vector trust metrics. However, that may solve the theoretical issue but I haven't seen any real examples of implementation. For instance, most of the papers referring to Advogato and Advogato-like systems are based on the client-server model. And to implement trust networks as it appears that they are done now, the shear amount of data necessary makes them pretty darned unwieldy. In addition, it is relatively well known (but time/bandwidth consuming) for a node to detect misbehaving nodes. But translating that to a trust metric, or even how to handle that on an implementation level has not been published anywhere. SO...is there anything out there on this sort of idea, especially on the implementation side? I mean...if this can be done in reality, then it has a whole host of uses even just in the small world of file sharing networks. As it stands, any trust metric that's been tried so far is easily tampered with by the clients. _______________________________________________ p2p-hackers mailing list [EMAIL PROTECTED] http://zgp.org/mailman/listinfo/p2p-hackers _______________________________________________ Here is a web page listing P2P Conferences: http://www.neurogrid.net/twiki/bin/view/Main/PeerToPeerConferences ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> ______________________________________________________________ ICBM: 48.07078, 11.61144 http://www.leitl.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE http://moleculardevices.org http://nanomachines.net
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