NavigaTor: Finding Faster Paths to Anonymity

Annessi, Robert; Schmiedecker, Martin

doi:10.1109/eurosp.2016.26

Cited by 27 publications

(22 citation statements)

References 25 publications

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“…We thus select it for comparison in our work. Annessi and Schmiedecker [14] report that CAR has only minor performance improvements in the current Tor network. Their experiment, however, was run on the live Tor network with only a single client that does not follow even a simple model of a real Internet user (as is used in Shadow), while the rest of the Tor users were running vanilla Tor.…”

Section: Related Workmentioning

confidence: 99%

“…To address these challenges, we simulated all the designs in Shadow, which simulates a whole Tor network with different client models. Furthermore, Annessi and Schmiedecker [14] point to changes in the token bucket refill interval from 1000 ms to 100 ms as a reason for CAR not being as effective. We used Tor version 0.2.5.12, which includes this change, in all of our simulations.…”

Section: Related Workmentioning

confidence: 99%

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Modified relay selection and circuit selection for faster Tor

2019

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Users of the Tor anonymity system suffer from less-than-ideal performance, in part because circuit building and selection processes are not tuned for speed. In this paper, we examine both the process of selecting among pre-built circuits and the process of selecting the path of relays for use in building new circuits to improve performance while maintaining anonymity. First, we show that having three prebuilt circuits available allows the Tor client to identify fast circuits and improves median time to first byte (TTFB) by 15% over congestion-aware routing, the current state-of-the-art method. Second, we propose a new path selection algorithm that includes broad geographic location information together with bandwidth to reduce delays. In Shadow simulations, we find 20% faster median TTFB and 11% faster median total download times over congestion-aware routing for accessing webpagesized objects. Our security evaluations show that this approach leads to better or equal security against a generic relay-level adversary compared to Tor, but increased vulnerability to targeted attacks. We explore this trade-off and find settings of our system that offer good performance, modestly better security against a generic adversary, and only slightly more vulnerability to a targeted adversary.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Modified relay selection and circuit selection for faster Tor

2019

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“…In 2016, Annessi and Schmiedecker [163] proposed and evaluated methods to measure and improve performance in the Tor network based on Shannon's information entropy theory. They use active Round-TripTime (RTT) to estimate the quality of circuits, and to validate the distribution of RTT values.…”

Section: A Information Entropymentioning

confidence: 99%

A Survey on Measuring Anonymity in Anonymous Communication Systems

Wang

2019

IEEE Access

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The popularity of Internet applications has made communication privacy an increasingly important security requirement. As an important aspect of privacy, anonymity ensures that a subject may use resources or services without disclosing user identity or corresponding relationships. Since the seminal work by Chaum for anonymous communication, many different anonymous communication systems, and anonymous protocols have been developed and investigated extensively. In recent years, anonymous communication systems have evolved from academic tools used by specialists to mass-market software used by millions of ordinary people. How to evaluate and quantify the anonymity that different anonymous communication systems can offer has been a new focus. Though some efforts have been made on anonymity metrics and measuring techniques, systematic research on measuring anonymity of anonymous communication systems is still needed. In this paper, we give a comprehensive overview of state-of-the-art research on measuring anonymity. We first summarize the anonymous mechanisms applied by different anonymous systems. We then introduce the formalization of the notion of anonymity for measuring the anonymity degree. Further, metrics based on various theories and approaches are reviewed. We particularly elaborate on the metrics based on information theory as a separate section because of its popularity and multiple branches. The metrics based on information entropy is probably of the greatest interest.

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“…The latency was 20ms or 200ms RTT between every node, and bandwidth was limited to 1Mbit/s. For comparison, Tor can take a few seconds to create a circuit with only 3 nodes [42].…”

Section: A Circuit Creationmentioning

confidence: 99%

Anonymous Data Sharing Between Organisations with Elliptic Curve Cryptography

Will

Schlickmann³

2017

2017 IEEE Trustcom/BigDataSE/Icess

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Promoting data sharing between organisations is challenging, without the added concerns over having actions traced. Even with encrypted search capabilities, the entities digital location and downloaded information can be traced, leaking information to the hosting organisation. This is a problem for law enforcement and government agencies, where any information leakage is not acceptable, especially for investigations. Anonymous routing is a technique to stop a host learning which agency is accessing information. Many related works for anonymous routing have been proposed, but are designed for Internet traffic, and are over complicated for internal usage. A streaming design for circuit creation is proposed using elliptic curve cryptography. Allowing for a simple anonymous routing solution, which provides fast performance with source and destination anonymity to other organisations.

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NavigaTor: Finding Faster Paths to Anonymity

Cited by 27 publications

References 25 publications

Modified relay selection and circuit selection for faster Tor

Modified relay selection and circuit selection for faster Tor

A Survey on Measuring Anonymity in Anonymous Communication Systems

Anonymous Data Sharing Between Organisations with Elliptic Curve Cryptography

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