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Low-Cost and Reliable Mutual Anonymity Protocols in Peer-to-Peer Networks
September 2003 (vol. 14 no. 9)
pp. 829-840
Li Xiao, IEEE
Zhichen Xu, IEEE

Abstract—We present several protocols to achieve mutual communication anonymity between an information requester and a provider in a P2P information-sharing environment, such that neither the requester nor the provider can identify each other, and no other peers can identify the two communicating parties with certainty. Most existing solutions achieve mutual anonymity in pure P2P systems without any trusted central controls. Compared with two such representative ones, our protocols improve efficiency in two different ways. First, utilizing trusted third parties and aiming at both reliability and low-cost, we propose a group of mutual anonymity protocols. We show that with some limited central support, our protocols can accomplish the goals of anonymity, efficiency, and reliability. Second, we propose a mutual anonymity protocol which relies solely on self-organizations among peers without any trusted central controls. In this protocol, the returning path can be shorter than the requesting path. This protocol does not need to broadcast the requested file back to the requester so that the bandwidth is saved and efficiency is improved. In addition, this protocol does not need special nodes to keep indices of sharing files, thus eliminating the index maintenance overhead and the potential for inconsistency between index records and peer file contents. We have evaluated our techniques in a browser-sharing environment. We show that the average increase in response time caused by our protocols is negligible, and these protocols show advantages over existing protocols in a P2P system.

[1] Boeing log files,ftp://researchsmp2.cc.vt.edu/pubboeing, 2003.
[2] D. Chaum, Untraceable Electronic Mail Return Addresses, and Digital Pseudonyms Comm. ACM, vol. 24, no. 2, pp. 84-88, Feb. 1981.
[3] I. Clarke, O. Sandberg, B. Wiley, and T.W. Hong, Freenet: A Distributed Anonymous Information Storage and Retrieval System: Design Privacy Enhancing Technologies Proc. Workshop Design Issues in Anonymity and Unobservability, pp. 46-66, July 2000.
[4] R. Dingledine, M.J. Freedman, and D. Molnar, The Free Haven Project: Distributed Anonymous Storage Service Proc. Workshop Design Issues in Anonymity and Unobservability, pp. 67-95, July 2000.
[5] P. Druschel and A. Rowstron, PAST: A Large-Scale, Persistent P2P Storage Utility Proc. Eighth Workshop Hot Topics in Operating Systems, May 2001.
[6] M.J. Freedman, E. Sit, J. Cates, and R. Morris, Introducing Tarzan, a Peer-to-Peer Anonymizing Network Layer Proc. First Int'l Workshop Peer-to-Peer Systems, Mar. 2002.
[7] http:/www.freedom.net, 2003.
[8] E. Gabber, P. Gibbons, D. Kristol, Y. Matias, and A. Mayer, Consistent, yet Anonymous, Web Access with LPWA Comm. ACM, vol. 42, no. 2, pp. 42-47, Feb. 1999.
[9] E. Gabber, P. Gibbons, Y. Matias, and A. Mayer, How to Make Personalized Web Browsing Simple, Secure, and Anonymous Proc. Conf. Financial Cryptography, pp. 17-31, Feb. 1997.
[10] Gnutella,http:/gnutella.wego.com, 2001.
[11] Y. Guan, X. Fu, R. Bettati, and W. Zhao, An Optimal Strategy for Anonymous Communication Protocols Proc. 22nd Int'l Conf. Distributed Computing Systems, pp. 257-266, July 2002.
[12] Napster,http:/www.napster.com, 2003.
[13] S. Ratnasamy, P. Francis, M. Handley, R. Karp, and S. Shenker, A Scalable Content-Addressable Network Proc. ACM SIGCOMM, pp. 161-172, Aug. 2001.
[14] M.K. Reiter and A.D. Rubin, Crowds: Anonymity for Web Transactions ACM Trans. Information and System Security, vol. 1, no. 1, pp. 66-92, Nov. 1998.
[15] RSAREF20,http://tirnanog.ls.fi.upm.es/Servicios/Software/ ap_ crypt/disk3rsaref20.zip, 1994.
[16] S. Saroiu, P.K. Gummadi, and S.D. Gribble, A Measurement Study of Peer-to-Peer File Sharing Systems Proc. Multimedia Computing and Networking, Jan. 2002.
[17] V. Scarlata, B.N. Levine, and C. Shields, Responder Anonymity and Anonymous Peer-to-Peer File Sharing Proc. Ninth Int'l Conf. Network Protocols, pp. 272-280, Nov. 2001.
[18] A. Serjantov, Anonymizing Censorship Resistant Systems Proc. First Int'l Workshop Peer-to-Peer Systems, Mar. 2002.
[19] A. Shamir, How to Share a Secret Comm. ACM, vol. 22, no. 11, pp. 612-613, Nov. 1979.
[20] R. Sherwood, B. Bhattacharjee, and A. Srinivasan, $P^5$: A Protocol for Scalable Anonymous Communication Proc. IEEE Symp. Security and Privacy, May 2002.
[21] C. Shields and B.N. Levine, A Protocol for Anonymous Communication over the Internet Proc. Seventh ACM Conf. Computer and Comm. Security, pp. 33-42, Nov. 2000.
[22] I. Stoica, R. Morris, D. Karger, M.F. Kasshoek, and H. Balakrishnan, Chord: A Scalable Peer-to-Peer Lookup Service for Internet Applications Proc. ACM SIGCOMM, pp. 149-160, Aug. 2001.
[23] A.B. Stubblefield and D.S. Wallach, Dagster: Censorship-Resistant Publishing without Replication Technical Report TR01-380, Dept. of Computer Science, Rice Univ., July 2001.
[24] P.F. Syverson, D.M. Goldschlag, and M.G. Reed, Anonymous Connections and Onion Routing Proc. 1997 IEEE Symp. Security and Privacy, pp. 44-53, 1997.
[25] M. Waldman and D. Mazi, Tangler: A Censorship-Resistant Publishing System Based on Document Entanglements Proc. Eighth ACM Conf. Computer and Comm. Security, pp. 126-135, 2001.
[26] M. Waldman, A.D. Rubin, and L.F. Cranor, Publius: A Robust, Tamper-Evident, Censorship-Resistant Web-Publishing System Proc. Ninth USENIX Security Symp., pp. 59-72, Aug. 2000.
[27] M. Wright, M. Adler, B.N. Levine, and C. Shields, An Analysis of the Degradation of Anonymous Protocols Proc. Ninth Ann. Symp. Network and Distributed System Security, Feb. 2002.
[28] L. Xiao, S. Chen, and X. Zhang, Dynamic Cluster Resource Allocations for Jobs with Known and Unknown Memory Demands IEEE Trans. Parallel and Distributed Systems, vol. 13, no. 3, pp. 223-240, Mar. 2002.
[29] L. Xiao, X. Zhang, and Z. Xu, A Reliable and Scalable Peer-to-Peer Web Document Sharing System Proc. Int'l Parallel and Distributed Processing Symp., Apr. 2002.

Index Terms:
Peer-to-peer (P2P) systems, mutual anonymity, communication protocols, Internet systems, overlay networks.
Citation:
Li Xiao, Zhichen Xu, Xiaodong Zhang, "Low-Cost and Reliable Mutual Anonymity Protocols in Peer-to-Peer Networks," IEEE Transactions on Parallel and Distributed Systems, vol. 14, no. 9, pp. 829-840, Sept. 2003, doi:10.1109/TPDS.2003.1233706
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