Amir Houmansadr
Assistant Professor
College of Information and Computer Sciences
University of Massachusetts Amherst
Office: 206 CS Building
E-mail: amir (at)
Online: Twitter, LinkedIn

I am an assistant professor of computer science at UMass Amherst since Fall 2014. My general area of research is network security and privacy, and I particularly work on problems such as Internet censorship resistance, statistical network traffic analysis, covert communications, location privacy, and privacy of emerging network architectures and protocols.
I received my Ph.D. from the University of Illinois at Urbana-Champaign in 2012 (advised by Nikita Borisov) and I was a postdoctoral scholar for two years at the University of Texas at Austin, honored to work with Vitaly Shmatikov. I also earned my M.Sc. and B.Sc. degrees from the Electrical Engineering Department of Sharif University of Technology.
I received a Google Faculty Research Award in 2015 and an NSF CAREER Award in 2016.


- 12/30/2018: Paper accepted at IEEE S&P'19!
- 11/06/2018: Paper accepted at NDSS'19!
- 07/24/2018: Two papers accepted at ACM CCS'18!
- 05/30/2018: I had a TV interview on Net Neutrality!
- 04/11/2018: We are excited to announce the beta release of MassBrowser censorship circumvention system. Please help us by running proxies, or use it to bypass censorship!
- 08/22/2017: Received a collaborative NSF Award to investigate IoT Privacy!
- 08/02/2017: 2/2 papers accepted at ACM CCS'17! Congrats to my students Hadi and Milad!
- 05/15/2017: Received a collaborative NSF/Intel Award to investigate future network architectures!
- 04/07/2017: I spoke at a panel at the Obfuscation Workshop at the NYU.
- 12/09/2016: I moderated a panel on Internet censorship at ACSAC 2016.
- 11/09/2016: I gave a keynote talk on Internet censorship at SBSeg 2016 in Niteroi, Brazil.
- 07/25/2016: Received a collaborative Medium NSF Award to investigate Covert Communications! Many thanks to the NSF!
- 07/23/2016: 2/2 papers accepted at CCS'16! Congrats to my students, Hadi and Milad!
- 04/25/2016: CovertCast is accepted at PETS'16!
- 02/25/2016: Our Book on Information Hiding is published!
- 01/27/2016: I received an NSF CAREER Award!


Technical Program Committee: Organizer:


   Spring'19: Advanced Information Assurance (CMPSCI 660)
   Fall'18: Introduction to Computer and Network Security (CMPSCI 460)
   Fall'18: Seminar - CyberSecurity Lecture Series (CMPSCI 591CF)
   Spring'18: Advanced Information Assurance (CMPSCI 660)
   Fall'17: Introduction to Computer and Network Security (CMPSCI 460)
   Spring'17: Advanced Information Assurance (CMPSCI 660)
   Fall'16: Introduction to Computer and Network Security (CMPSCI 460/597N)
   Fall'16: Seminar - CyberSecurity Lecture Series (CMPSCI 591CF)
   Fall'15: Introduction to Computer and Network Security (CMPSCI 460)
   Fall'15: Special Topics - Introduction to Computer and Network Security (CMPSCI 597N)
   Fall'15: Seminar - Cyber Security Faculty Lecture Series (CMPSCI 591CF)
   Spring'15: Advanced Information Assurance (CMPSCI 660)
   Fall'14: Hot Topics in Privacy Enhancing Technologies (CMPSCI 691PT)

Selected Publications [All Publications|Google Scholar|DBLP]

Enemy At the Gateways: Censorship-Resilient Proxy Distribution Using Game Theory
    Milad Nasr, Sadegh Farhang, Amir Houmansadr, and Jens Grossklags
    NDSS 2019
DeepCorr: Strong Flow Correlation Attacks on Tor Using Deep Learning
    Milad Nasr, Alireza Bahramali, and Amir Houmansadr
    ACM CCS 2018
Machine Learning with Membership Privacy using Adversarial Regularization
    Milad Nasr, Reza Shokri, and Amir Houmansadr
    ACM CCS 2018
Compressive Traffic Analysis: A New Paradigm for Scalable Traffic Analysis
    Milad Nasr, Amir Houmansadr, and Arya Mazumdar
    ACM CCS 2017
The Waterfall of Liberty: Decoy Routing Circumvention that Resists Routing Attacks
    Milad Nasr, Hadi Zolfaghari, and Amir Houmansadr
    ACM CCS 2017
Information Hiding in Communication Networks: Fundamentals, Mechanisms, Applications, and Countermeasures
  Wojciech Mazurczyk, Steffen Wendzel, Sebastian Zander, Amir Houmansadr, and Krzysztof Szczypiorski
  Wiley-IEEE Press, February 2016
GAME OF DECOYS: Optimal Decoy Routing Through Game Theory
    Milad Nasr and Amir Houmansadr
    ACM CCS 2016
Practical Censorship Evasion Leveraging Content Delivery Networks
    Hadi Zolfaghari and Amir Houmansadr
    ACM CCS 2016
CacheBrowser: Bypassing Chinese Censorship without Proxies Using Cached Content
    John Holowczak and Amir Houmansadr
    ACM CCS 2015
No Direction Home: The True Cost of Routing Around Decoys
    Amir Houmansadr, Edmund L Wong, and Vitaly Shmatikov
    NDSS 2014
Non-Blind Watermarking of Network Flows
    Amir Houmansadr, Negar Kiyavash, and Nikita Borisov
    IEEE/ACM Transactions on Networking, August 2014
The Need for Flow Fingerprints to Link Correlated Network Flows
    Amir Houmansadr and Nikita Borisov
    PETS 2013
The Parrot is Dead: Observing Unobservable Network Communications
    Amir Houmansadr, Chad Brubaker, and Vitaly Shmatikov
    IEEE S&P (Oakland) 2013
    (The Best Practical Paper Award)
I Want My Voice to Be Heard: IP Over Voice-over-IP for Unobservable Censorship Circumvention
    Amir Houmansadr, Thomas Riedl, Nikita Borisov, and Andrew Singer
    NDSS 2013
CensorSpoofer: Asymmetric Communication using IP Spoofing for Censorship-Resistant Web Browsing
    Qiyan Wang, Xun Gong, Giang Nguyen, Amir Houmansadr, and Nikita Borisov
    ACM CCS 2012
Cirripede: Circumvention Infrastructure using Router Redirection with Plausible Deniability
    Amir Houmansadr, Giang T. K. Nguyen, Matthew Caesar, and Nikita Borisov
    ACM CCS 2011
SWIRL: A Scalable Watermark to Detect Correlated Network Flows
    Amir Houmansadr and Nikita Borisov
    NDSS 2011
RAINBOW: A Robust And Invisible Non-Blind Watermark for Network Flows
    Amir Houmansadr, Negar Kiyavash, and Nikita Borisov
    NDSS 2009

Selected Awards

   • NSF CAREER Award, Jan 2016.
   • Google Faculty Research Award, Feb 2015.
   • The Best Practical Paper award at the IEEE Symposium on Security & Privacy (Oakland), 2013.
   • The ECE Computer Engineering Fellowship awarded by the ECE department of UIUC (sponsored by Intel), 2012.
   • The Outstanding Team Presentation award at UIUC's CS Grad Symposium, 2012.