Freenet-2001

Freenet-2001 - Freenet: A Distributed Anonymous Information...

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Freenet: A Distributed Anonymous Information Storage and Retrieval System Ian Clarke 1 , Oskar Sandberg 2 , Brandon Wiley 3 , and Theodore W. Hong 4 ? 1 Uprizer, Inc., 1007 Montana Avenue #323, Santa Monica, CA 90403, USA ian@octayne.com 2 M¨orbydalen 12, 18252 Stockholm, Sweden md98-osa@nada.kth.se 3 2305 Rio Grande Street, Austin, TX 78705, USA blanu@uts.cc.utexas.edu 4 Department of Computing, Imperial College of Science, Technology and Medicine, 180 Queen’s Gate, London SW7 2BZ, United Kingdom t.hong@doc.ic.ac.uk Abstract. We describe Freenet, an adaptive peer-to-peer network ap- plication that permits the publication, replication, and retrieval of data while protecting the anonymity of both authors and readers. Freenet operates as a network of identical nodes that collectively pool their stor- age space to store data files and cooperate to route requests to the most likely physical location of data. No broadcast search or centralized loca- tion index is employed. Files are referred to in a location-independent manner, and are dynamically replicated in locations near requestors and deleted from locations where there is no interest. It is infeasible to disco- ver the true origin or destination of a file passing through the network, and difficult for a node operator to determine or be held responsible for the actual physical contents of her own node. 1 Introduction Networked computer systems are rapidly growing in importance as the medium of choice for the storage and exchange of information. However, current systems afford little privacy to their users, and typically store any given data item in only one or a few fixed places, creating a central point of failure. Because of a continued desire among individuals to protect the privacy of their authorship or readership of various types of sensitive information[28], and the undesirability of central points of failure which can be attacked by opponents wishing to re- move data from the system[11,27] or simply overloaded by too much interest[1], systems offering greater security and reliability are needed. We are developing Freenet, a distributed information storage and retrieval system designed to address these concerns of privacy and availability. The system operates as a location-independent distributed file system across many individual ? Work of Theodore W. Hong was supported by grants from the Marshall Aid Com- memoration Commission and the National Science Foundation. H. Federrath (Ed.): Anonymity 2000, LNCS 2009, pp. 46–66, 2001. c ± Springer-Verlag Berlin Heidelberg 2001
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Freenet 47 computers that allows files to be inserted, stored, and requested anonymously. There are five main design goals: Anonymity for both producers and consumers of information Deniability for storers of information Resistance to attempts by third parties to deny access to information Efficient dynamic storage and routing of information Decentralization of all network functions The system is designed to respond adaptively to usage patterns, transparently
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Freenet-2001 - Freenet: A Distributed Anonymous Information...

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