Journal Reviews & Publications


RESEARCH PUBLICATIONS

(1)  Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Reducing Congestion in the Tor Network with Circuit Switching, Journal of Information Processing, vol.23, no.5, pp.589-602, September 2015.

(2)  Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Evaluation of Dynamic Circuit Switching to Reduce Congestion in Tor. 25th International Telecommunication Networks and Applications Conference (ITNAC) 2015, UNSW, pp. 326-331, November 2015.

(3)  Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, A Circuit Switching Method for Improving Congestion of Tor Network, Proc. of the 16th International Symposium on Multimedia Network Systems and Applications (BWCCA-2014), pp. 416-421, November 2014.

(4)  Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Analyzing the Drawbacks of Node-Based Delays in Tor, Proc. of IEEE CQR 2014, USA, pp. 1-6, May 2014.

(5)  Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Effectiveness of Performance Flag Selection for Enhancing Tor Circuit, Proc. of APNOMS 2013, pp. 1-3, September 2013.

(6)  Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Improving Tor Network Throughput by the Circuit Switching, IEICE General Conference, BS-3-7, March 2015.

(7)  Kale Timothy Girry, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Towards Improving Congestion Control in Tor, IEICE General Conference, BS-1-15, March 2014.

(8)  Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Employing Flags Selection Techniques for Improving Tor Performance, IEICE General Conference, BS-1-13, March 2013.

(9)  Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Improving Tor Circuit Performance with Guard Relay Nodes, IEICE General Conference, BS-3-14, March 2012.

(10)     Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Improving Tor Performance with Dynamic Circuit Switching, IEICE Society Conference, BS-6-18, September 2015.

(11)     Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Measuring output buffer utilization for Interactive Users in Tor, IEICE Society Conference, BS-6-19, September 2014.

(12)     Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, A Simple Modelling for Delay Analysis of the Tor Network, IEICE Society Conference, BS-7-50, September 2013.

(13)     Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Improving Tor Circuit Performance with Stable Guard and Fast Flags Relay Nodes, IEICE Society Conference, BS-5-20, September 2012.

(14)     Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Improving Traffic Load Distribution for Tor Network, IEICE Technical Report, October 2015.

(15)     Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, A Design of Circuit Switching Method for Reducing Congestion in the Tor Network, IEICE Technical Report, October 2014.

(16)     Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, An Evaluation of Node-Based Delays in Tor Network, IEICE Technical Report, January 2014.

(17)     Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, The Effect of Node-Based Delays on Tor Performance, IEICE Technical Report, October 2013.

(18)     Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Measuring Available Bandwidth for Path Selection of Tor Network, Technical Committee on Information Networks, vol.113, no.5, IN2013-9, pp.49-54, April 2013.


(19)     Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, A Performance Enhancement Method of Tor Circuit by Employing Flags Selection on Cooperative Relays, All Technical Committee IN-MoMuC Joint Conference, vol.112, no.307, IN2012-118, pp.45-50, November 2012. 



List of conferences and papers

International Conferences
  1. Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu, and Toshihiko Kato, A Circuit Switching Method for Improving Congestion of Tor Network, Proc. of the 16-th International Symposium on Multimedia Network Systems and Applications (MNSA-2014), 6 pages, 2014.
  2. Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu, and Toshihiko Kato, Analyzing the Drawbacks of Node-Based Delays in Tor, Proc. of IEEE CQR 2014, 6 pages, 2014.
  3. Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu, and Toshihiko Kato, Effectiveness of Performance Flag Selection for Enhancing the Tor Circuit, Proc. of APNOMS 2013, 3 pages, 2013.

IEICE General Conferences
  1. Timothy Girry Kale, Satoshi Ohzahata, Wu Celimuge, Toshihiko Kato,  Improving Tor Network Throughput by the Circuit Switching, IEICE General Conference, BS-3-7, 2015.
  2. Kale Timothy Girry, Satoshi Ohzahata, Celimuge Wu, and Toshihiko Kato, Towards Improving         Congestion Control in Tor, IEICE General Conference, BS-1-15, 2014.
  3. Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Employing Flags Selection Techniques for Improving Tor Performance, IEICE General Conference, BS-1-13, 2013.
  4. Timothy Kale, Satoshi Ohzahata, Toshihiko Kato, Improving Tor Circuit Performance with Guard Relay Nodes, IEICE General Conference, BS-3-14, 2012.

IEICE Society Conferences
  1. Timothy G. Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, Measuring output buffer utilization for Interactive Users in Tor, IEICE Society Conference, BS-6-19, 2014.
  2. Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Improving Tor Circuit Performance with Stable Guard and Fast Flags Relay Nodes, IEICE Society Conference, BS-5-20, 2012.
  3. Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, A Simple Modeling for Delay Analysis of the Tor Network, IEICE Society Conference, BS-7-50, 2013.

IEICE Technical Reports
  1. Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu and Toshihiko Kato, A Design of Circuit Switching Method for Reducing Congestion in the Tor Network, IEICE Technical Report, 2014.
  2. Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu, and Toshihiko Kato, An Evaluation of Node-Based Delays in Tor Network, IEICE Technical Report, 2014.
  3. Timothy Girry Kale, Satoshi Ohzahata, Celimuge Wu, Toshihiko Kato , The Effect of Node-Based Delays on Tor Performance, IEICE Technical Report, 2013.
  4. Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, Measuring Available Bandwidth for Path Selection of Tor Network, Technical Committee on Information Networks, vol. 113, no. 5, IN2013-9, pp. 49-54, 2013.
  5. Timothy Girry Kale, Satoshi Ohzahata, Toshihiko Kato, A Performance Enhancement Method of Tor Circuit by Employing Flags Selection on Cooperative Relays,All Technical Committee IN-MoMuC Joint Conference, vol. 112, no. 307, IN2012-118, pp. 45-50, 2012. 





Laboratory Reviewing Research Papers:



1. Spying the world from your laptop:  PDF File

NS Laboratory Reviewer:   Timothy Girry. Kale, University of Electro-Communications, Tokyo, Japan, 2010

Authors:   Stevens Le Blond, Arnaud Legout, Fabrice Lefessant, Walid Dabbous, Mohamed Ali Kaafar I.N.R.I.A, France. 

Abstract: 
This paper presents a set of exploits an adversary can use to continuously spy on most BitTorrent users of the Internet from a single machine and for a long period of time. Using these exploits for a period of 103 days, we collected 148 million IPs downloading 2 billion copies of contents. We identify the IP address of the content providers for 70% of the BitTorrent contents we spied on. We show that a few content providers inject most contents into BitTorrent and that those content providers are located in foreign data centers. We also show that an adversary can compromise the privacy of any peer in BitTorrent and identify the big downloaders that we define as the peers who subscribe to a large number of contents. This infringement on users’ privacy poses a significant impediment to the legal adoption of BitTorrent.

Review Documents:  
  • Microsoft Word review file: MS File (Contain Japanese characters - Require download )
  • PowerPoint presentation review file (PDF Format): Presentation File

 By administrator:  Timothy G. Kale





2. Low-Cost Traffic Analysis of Tor:  PDF File

 NS Laboratory Reviewer:   Timothy Girry. Kale, University of Electro-Communications, Tokyo, Japan, 2010

Authors:   Steven J. Murdoch and George Danezis, University of Cambridge, Computer Laboratory
                 15 JJ Thomson Avenue, Cambridge CB3 0FD United Kingdom

Abstract: 
Tor is the second generation Onion Router, supporting the anonymous transport of TCP streams over the Internet. Its low latency makes it very suitable for common tasks, such as web browsing, but insecure against traffic analysis attacks by a global passive adversary. We present new traffic-analysis techniques that allow adversaries with only a partial view of the network to infer which nodes are being used to relay the anonymous streams and therefore greatly reduce the anonymity provided by Tor. Furthermore, we show that otherwise unrelated streams can be linked back to the same initiator. Our attack is feasible for the adversary anticipated by the Tor designers. Our theoretical attacks are backed up by experiments performed on the
deployed, albeit experimental, Tor network. Our techniques should also be applicable to any low latency anonymous network. These attacks highlight the relationship between the field of traffic-analysis and more traditional computer security issues, such as covert channel analysis. Our research also highlights that the inability to directly observe network links does not prevent an attacker from performing traffic-analysis: the adversary can use the anonymising network as an oracle to infer the traffic load on remote nodes in order to perform traffic-analysis.

Review Documents:  
  • Microsoft Word Review File: MS File (Contain Japanese characters - Require download )
  • PowerPoint presentation review file (PDF Format): Presentation File

By administrator:  Timothy G. Kale
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