NDLI: Tor is unfair — And what to do about it

Content Provider	IEEE Xplore Digital Library
Author	Tschorsch, F. Scheuermann, B.
Copyright Year	2011
Description	Author affiliation: Telematics Group University of Würzburg, Germany (Tschorsch, F.; Scheuermann, B.)
Abstract	Tor is one of the most popular network anonymization services. With increasing popularity, however, Tor is also faced with increasing load. Mechanisms for handling congestion and fairness in anonymization networks, where user privacy is of greatest significance, are not yet well understood. Thus current designs leave a lot to be desired: gross unfairness and largely suboptimal performance can be observed. In this paper, we focus on fairness aspects in the Tor network. We first show that interactions of multiple scheduling mechanisms in the current Tor design cause heavily unfair resource allocations to users. Subsequently, we develop a fairness model based on max-min fairness that takes the specifics of Tor into account. This leads us to a re-design of Tor's scheduling. We implement the new design in conjunction with a congestion feedback mechanism named N23, which has recently been proposed to be used in Tor. Our scheduling approach overcomes the unfairness problems which are exhibited by today's Tor implementation, and by Tor with N23 as well. It achieves global max-min fairness and thus a fair resource allocation despite selfish end-users.
Starting Page	432
Ending Page	440
File Size	157659
Page Count	9
File Format	PDF
ISBN	9781612849263
ISSN	07421303
e-ISBN	9781612849287
DOI	10.1109/LCN.2011.6115503
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-04
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth Resource management Integrated circuit modeling Round robin Multiplexing Vectors Scheduling
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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