About Me

I am a Ph.D. candidate in the Khoury College of Computer Sciences at Northeastern University, where I am being advised by Christo Wilson. I completed my undergradute in Computer Science from School of Science and Engineering, LUMS, Pakistan.

My current research focuses on web security & privacy. In particular, I am studying the online advertising ecosystem on the web to understand how it impacts users' privacy. My goal is to make the online advertising ecosystem more transparent to enable users make informed decisions regarding their personal information. I have previously worked on projects aimed at limiting abuse on online services such as Facebook and Twitter.

Education

• Khoury College of Computer Sciences, Northeastern University   (September 2014 - Present)
  Ph.D. Candidate

• School of Science and Engineering, LUMS, Pakistan     (October 2008 - June 2012)
  BS, Computer Science

Publications

• Quantity vs. Quality: Evaluating User Interest Profiles Using Ad Preference Managers
  Muhammad Ahmad Bashir and Umar Farooq and Maryam Shahid and Muhammad Fareed Zaffar and Christo Wilson
  In Proceedings of the Network and Distributed System Security Symposium (NDSS '19), San Diego, CA, USA, February 2019.
  [PDF] [BibTeX] [Slides]

• How Tracking Companies Circumvented Ad Blockers Using WebSockets
  Muhammad Ahmad Bashir and Sajjad Arshad and Engin Kirda and William Robertson and Christo Wilson
  In Proceedings of ACM Internet Measurement Conference (IMC '18), Boston, MA, USA, October 2018.
  [PDF] [BibTeX] [Slides] [Also appeared in ConPro '18 Workshop]

• Diffusion of User Tracking Data in the Online Advertising Ecosystem
  Muhammad Ahmad Bashir and Christo Wilson
  In Proceedings on Privacy Enhancing Technologies (PETS '18), Barcelona, Spain, July, 2018.
  [PDF] [BibTeX] [Slides] [Dataset] [FPF Privacy Privacy Papers for Policymakers Award 2018]

• "Recommended For You": A First Look at Content Recommendation Networks
  Muhammad Ahmad Bashir, Sajjad Arshad and Christo Wilson
  In Proceedings of ACM Internet Measurement Conference (IMC '16), Santa Monica, CA, USA, November 2016.
  [PDF] [BibTeX] [Slides] [Dataset]

• Tracing Information Flows Between Ad Exchanges Using Retargeted Ads
  Muhammad Ahmad Bashir, Sajjad Arshad, William Robertson, and Christo Wilson
  In Proceedings of the 25th USENIX Security Symposium (USENIX Security '16), Austin, TX, USA, August 2016.
  [PDF] [BibTeX] [Slides] [Dataset]

• Strength in Numbers: Robust Tamper Detection in Crowd Computations
  Bimal Viswanath, Muhammad Ahmad Bashir, Muhammad Bilal Zafar, Simon Bouget, Saikat Guha, Krishna P. Gummadi, Aniket Kate, and Alan Mislove
  In Proceedings of the 3rd ACM Conference on Online Social Networks (COSN '15), Palo Alto, CA, USA, November 2015.
  [PDF] [BibTeX] [Best Paper Award]

• Preserving Privacy in Collaborative Business Process Composition
  Hassaan Irshad, Basit Shafiq, Jaideep Vaidya, Muhammad Ahmad Bashir, Shafay Shamail, and Nabil Adam
  In Proceedings of the 12th International Conference on Security and Cryptography (SECRYPT '15), Colmar, France, July 2015.
  [PDF] [BibTeX] [Best Paper Award]

• Towards Detecting Anomalous User Behavior in Online Social Networks
  Bimal Viswanath, Muhammad Ahmad Bashir, Mark Crovella, Saikat Guha, Krishna Gummadi, Balachander Krishnamurthy, and Alan Mislove
  In Proceedings of the 23rd USENIX Security Symposium (USENIX Security '14), San Diego, CA, USA, August 2014.
  [PDF] [BibTeX] [Slides]

Work Experience

• Northeastern University
  Graduate Research Assistant
  Advisor : Christo Wilson
  September 2014 - Present

• International Computer Science Institute ( ICSI )
  Research Intern
  Advisor : Narseo Vallina-Rodriguez
  Summer 2018

• Facebook
  Security Engineering Intern (Threat Infrastructure)
  Summer 2017

• Facebook
  Security Engineering Intern (Online Safety)
  Summer 2016

• Max Planck Institute for Software Systems, Germany
  Research Intern
  Advisor : Dr. Krishna Gummadi

• School of Science and Engineering, LUMS, Pakistan
  Research Assistant
  Advisor : Dr. Basit Shafiq