Analysis of Anonymity in P2P Anonymous Communication Systems

Jia, Zhang; Duan, Haixin; Liu, Wu; Wu, Jianping

doi:10.1109/waina.2010.148

Cited by 7 publications

(8 citation statements)

References 16 publications

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“…APAC can also be adjusted to select all intermediate nodes globally to avoid choosing disproportionate number of adversarial peers. For a given circuit, by controlling the first relay, the responder and at least half of the intermediate peers alternatively in the circuit, the adversary can determine the initiator [75]. We show that an adversarial placement of peers (e.g., placing more peers nearby the victim) does not give significant advantage over a randomized placement by an honest-but-curious adversary (details in Appendix A).…”

Section: Design Of Apacmentioning

confidence: 98%

“…Thus to confirm one of the controlled nodes is the first relay (only when the adversary knows the length), the adversary has to control the responder and some intermediate nodes in the circuit to reconstruct the circuit. For a given circuit, by controlling the first relay, the responder and at least half of the intermediate peers alternatively in the circuit, the adversary can determine the initiator [75]. However, we consider the worst case that the adversary can learn the distance between any two controlled peers by passively logging forwarded requests and transmit- ted data as well as timing attacks 5 .…”

Section: Analysis Of Initiator Anonymitymentioning

confidence: 99%

See 1 more Smart Citation

Anonymity in Peer-assisted CDNs: Inference Attacks and Mitigation

Jia

Bai

Saxena

et al. 2016

Proceedings on Privacy Enhancing Technologies

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Abstract:The peer-assisted CDN is a new content distribution paradigm supported by CDNs (e.g., Akamai), which enables clients to cache and distribute web content on behalf of a website. Peer-assisted CDNs bring significant bandwidth savings to website operators and reduce network latency for users. In this work, we show that the current designs of peerassisted CDNs expose clients to privacy-invasive attacks, enabling one client to infer the set of browsed resources of another client. To alleviate this, we propose an anonymous peerassisted CDN (APAC), which employs content delivery while providing initiator anonymity (i.e., hiding who sends the resource request) and responder anonymity (i.e., hiding who responds to the request) for peers. APAC can be a web service, compatible with current browsers and requiring no client-side changes. Our anonymity analysis shows that our APAC design can preserve a higher level of anonymity than state-of-the-art peer-assisted CDNs. In addition, our evaluation demonstrates that APAC can achieve desired performance gains.

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Section: Design Of Apacmentioning

confidence: 98%

Section: Analysis Of Initiator Anonymitymentioning

confidence: 99%

Anonymity in Peer-assisted CDNs: Inference Attacks and Mitigation

Jia

Bai

Saxena

et al. 2016

Proceedings on Privacy Enhancing Technologies

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“…Mohajeri et al [23] analyzed the new obfuscation protocol of Tor, and an application of this protocol as SkypeMorph. Zhang et al [25] investigated the anonymity of different anonymous communication systems. They modeled the P2P anonymous communications and took quantitative analysis of anonymity by information theory with entropy.…”

Section: Related Workmentioning

confidence: 99%

A Novel Protocol-Feature Attack against Tor's Hidden Service

Wang

Wen

Zhang

et al. 2016

IEICE Trans. Inf. & Syst.

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SUMMARY Tor is the most popular and well-researched low-latency anonymous communication network provides sender privacy to Internet users. It also provides recipient privacy by making TCP services available through "hidden service", which allowing users not only to access information anonymously but also to publish information anonymously. However, based on our analysis of the hidden service protocol, we found a special combination of cells, which is the basic transmission unit over Tor, transmitted during the circuit creation procedure that could be used to degrade the anonymity. In this paper, we investigate a novel protocol-feature based attack against Tor's hidden service. The main idea resides in fact that an attacker could monitor traffic and manipulate cells at the client side entry router, and an adversary at the hidden server side could cooperate to reveal the communication relationship. Compared with other existing attacks, our attack reveals the client of a hidden service and does not rely on traffic analysis or watermarking techniques. We manipulate Tor cells at the entry router to generate the protocol-feature. Once our controlled entry onion routers detect such a feature, we can confirm the IP address of the client. We implemented this attack against hidden service and conducted extensive theoretical analysis and experiments over Tor network. The experiment results validate that our attack can achieve high rate of detection rate with low false positive rate.

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“…In recent years, P2P (peer-to-peer) network has gathered broad attentions because of the fact that the peer nodes have no need to be with the help of intermediate servers to achieve the purpose of communicating with each other. Besides, it has become a technology which has a bright future [6]. In the last decade, the number of applications based on P2P technology has been increasing, such as BT, PPLive and eDonkey, Thunder.…”

Section: Introductionmentioning

confidence: 99%

“…Loop(2) Search (in packet, SA, DA, SP, DP, Pro) (3) {//get the five-tuple information (4) for ( = 1; ≤ 3; ++) (5) {//traverse three level bloom filters;(6) for ( = 1; ≤ ; ++) (7)…”

mentioning

confidence: 99%

Multilevel Bloom Filters for P2P Flows Identification Based on Cluster Analysis in Wireless Mesh Network

Wang

et al. 2015

Discrete Dynamics in Nature and Society

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With the development of wireless mesh networks and distributed computing, lots of new P2P services have been deployed and enrich the Internet contents and applications. The rapid growth of P2P flows brings great pressure to the regular network operation. So the effective flow identification and management of P2P applications become increasingly urgent. In this paper, we build a multilevel bloom filters data structure to identify the P2P flows through researches on the locality characteristics of P2P flows. Different level structure stores different numbers of P2P flow rules. According to the characteristics values of the P2P flows, we adjust the parameters of the data structure of bloom filters. The searching steps of the scheme traverse from the first level to the last level. Compared with the traditional algorithms, our method solves the drawbacks of previous schemes. The simulation results demonstrate that our algorithm effectively enhances the performance of P2P flows identification. Then we deploy our flow identification algorithm in the traffic monitoring sensors which belong to the network traffic monitoring system at the export link in the campus network. In the real environment, the experiment results demonstrate that our algorithm has a fast speed and high accuracy to identify the P2P flows; therefore, it is suitable for actual deployment.

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Analysis of Anonymity in P2P Anonymous Communication Systems

Cited by 7 publications

References 16 publications

Anonymity in Peer-assisted CDNs: Inference Attacks and Mitigation

Anonymity in Peer-assisted CDNs: Inference Attacks and Mitigation

A Novel Protocol-Feature Attack against Tor's Hidden Service

Multilevel Bloom Filters for P2P Flows Identification Based on Cluster Analysis in Wireless Mesh Network

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