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Paper Abstract and Keywords
Presentation 2015-10-16 13:05
Improving Traffic Load Distribution for Tor Network
Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu, Toshihiko Kato (UEC) IN2015-58
Abstract (in Japanese) (See Japanese page) 
(in English) The Tor network has its user grown by thousands every year. The increasing number of users around the world makes Tor become one of the widely used privacy network today. However, as the number of Tor user increases, the performance of Tor network degrades rapidly due to increasing circuit congestion. Tor fails to provide better quality of communication due to unfairly distribution of traffic load between the bulk and the light users. This problem contributed to throughput degradation and poor quality of services when onion routers were overloaded. To improve these problems, we proposed a simple method of dynamic circuit switching in the Tor application level to efficiently reduce the load in Tor output buffers and TCP socket buffers. By actively switching the bulk traffics at the circuit level to different TCP connection and higher capacity ORs, we were able to distribute the load efficiently with high fairness indexes for all bulk and light users. We evaluated the proposed method on our setup testbed experiment and partly in the live Tor network. Our experimental results show the proposed method achieves fairness in throughputs under multiple circuit flows.
Keyword (in Japanese) (See Japanese page) 
(in English) Onion Router (OR) / Onion Proxy (OP) / Circuit Switching / Throughputs / Buffer Occupancy / Fairness Index / TCP /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 252, IN2015-58, pp. 29-34, Oct. 2015.
Paper # IN2015-58 
Date of Issue 2015-10-08 (IN) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee IN  
Conference Date 2015-10-15 - 2015-10-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Contingency Plan/BCP, Robustness, Security and Privacy, Authentication/ID management, Web Service/SOA/ROA Platform, Social Networking Service (SNS), etc. 
Paper Information
Registration To IN 
Conference Code 2015-10-IN 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving Traffic Load Distribution for Tor Network 
Sub Title (in English)  
Keyword(1) Onion Router (OR)  
Keyword(2) Onion Proxy (OP)  
Keyword(3) Circuit Switching  
Keyword(4) Throughputs  
Keyword(5) Buffer Occupancy  
Keyword(6) Fairness Index  
Keyword(7) TCP  
1st Author's Name Timothy Girry Kale  
1st Author's Affiliation University of Electro-Communications (UEC)
2nd Author's Name Satoshi Ohzahata  
2nd Author's Affiliation University of Electro-Communications (UEC)
3rd Author's Name Celimuge Wu  
3rd Author's Affiliation University of Electro-Communications (UEC)
4th Author's Name Toshihiko Kato  
4th Author's Affiliation University of Electro-Communications (UEC)
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Date Time 2015-10-16 13:05:00 
Presentation Time 25 
Registration for IN 
Paper # IEICE-IN2015-58 
Volume (vol) IEICE-115 
Number (no) no.252 
Page pp.29-34 
#Pages IEICE-6 
Date of Issue IEICE-IN-2015-10-08 

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