OpenTor: Anonymity as a Commodity Service

Elli Androulaki; Mariana Petrova Raykova; Angelos Stavrou; Steven Michael Bellovin

OpenTor: Anonymity as a Commodity Service
Androulaki, Elli
Raykova, Mariana Petrova
Stavrou, Angelos
Bellovin, Steven Michael
Technical reports
Computer Science
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Columbia University Computer Science Technical Reports
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Department of Computer Science, Columbia University
Publisher Location:
New York
Despite the growth of the Internet and the increasing concern for privacy of online communications, current deployments of anonymization networks depends on a very small set of nodes that volunteer their bandwidth. We believe that the main reason is not disbelief in their ability to protect anonymity, but rather the practical limitations in bandwidth and latency that stem from limited participation. This limited participation, in turn, is due to a lack of incentives. We propose providing economic incentives, which historically have worked very well. In this technical report, we demonstrate a payment scheme that can be used to compensate nodes which provide anonymity in Tor, an existing onion routing, anonymizing network. We show that current anonymous payment schemes are not suitable and introduce a hybrid payment system based on a combination of the Peppercoin Micropayment system and a new type of "one use" electronic cash. Our system claims to maintain users' anonymity, although payment techniques mentioned previously --- when adopted individually --- provably fail.
Computer science
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Suggested Citation:
Elli Androulaki, Mariana Petrova Raykova, Angelos Stavrou, Steven Michael Bellovin, , OpenTor: Anonymity as a Commodity Service, Columbia University Academic Commons, .

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