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Marcin Matuszewski marcin.matuszewski@nokia

P2PSIP Security Analysis draft-matuszewski-p2psip-security-requirements-02 draft-song-p2psip-security-eval-00 71st IETF - Philadelphia, PA, USA P2PSIP WG Meeting. Marcin Matuszewski marcin.matuszewski@nokia.com Jan-Erik Ekberg jan-erik.ekberg@nokia.com

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Marcin Matuszewski marcin.matuszewski@nokia

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  1. P2PSIP Security Analysis draft-matuszewski-p2psip-security-requirements-02draft-song-p2psip-security-eval-0071st IETF - Philadelphia, PA, USA P2PSIP WG Meeting Marcin Matuszewski marcin.matuszewski@nokia.com Jan-Erik Ekberg jan-erik.ekberg@nokia.com Pekka Laitinen pekka.laitinen@nokia.com Song Yongchao melodysong@huawei.com Ben Y. Zhao ravenben@cs.ucsb.edu

  2. Challenges Facing P2PSIP Security • Nodes in the overlay are highly autonomous • They could do what they want to do • The functions of the overlay • Realized by the services between peers • Two basic services: routing service and storage service • So the requested actions from the peers who provide service are suspicious • It may not be served according to the service agreements

  3. P2PSIP Security Analysis Application Distributed storage/ replication P2P Layers Routing maintenance/KBR/ NAT/FW traversal Transport Security with each layer must be considered List some of security threats, not Complete!

  4. Security On Routing • Intermediate peers may • Discard the message • Forward to the wrong next-hop • Modify messages before forwarding • Open issues • Should the peer (As a Client) check whether the peer (As a Server) serve the request properly? • Or just ignore these misbehavior?

  5. Security On Routing • Any peer who is on the path to the destination peer May • Claim it is the peer being responsible for the key • It also called Identity Attack • What could the peer sending the message do? • Accept the results unconditionally • Or do some check?

  6. Security On Storage • A malicious peer may • Publish a large amount of useless data into the overlay? • It may make valid PUT operation fail? • Open issue • Does the P2PSIP need a mechanism to prevent or reduce the adverse effect?

  7. Security On Storage • Any peer may • Put malicious information, such as a victim’s reachability information; • May launch DDoS attack on the victim; • P2P overlay Should not be a DDoS engine by attackers

  8. Discussions • What’s the scope of the security considerations? • Ignore most of the malicious behavior while designing protocol? • Or establish framework to reduce the adverse effect from the malicious behavior? • Are the security considerations proposed in current proposals enough?

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