About Me

I am currently a fifth year Ph.D. Candidate in the Computer & Information Sciences & Engineering (CISE) Department at the University of Florida. I work at the Florida Institute for CyberSecurity (FICS) lab where I am advised by Patrick Traynor. Previously, I earned my Bachelor's degree in Computer Engineering from Florida International University in 2015.

My current research interests include cyber security measurement studies, spread of disinformation, and graph-based approaches to security problems.

I am currently looking for a job as I will be finishing my doctorate program in the Summer of 2021


  • January 2021 - I am officially a Ph.D. Candidate! I plan to finish my doctorates degree by the ending of Summer 2021.
  • October 2020 - Our work on detecting disinformation-like coordinated activity has been accepted at the Cloud Computing Security Workshop (CCSW'20).
  • April 2020 - I am happy to say that I will again spend my summer working with FireEye working on creating tools to better analyze disinformation campaigns.
  • May 2019 - I accepted an internship offer from FireEye where I will be working on identifying disinformation campaigns and unauthentic behavior.
  • May 2019 - I pass by qualifiers exam - one step closer to the PhD!
  • Nov 2018 - our Hospital research paper got accepted to NDSS.
  • Aug 2018 - Our SMS work got accepted to TOPS journal.
  • Jul 2018 - our paper on time-based encryption got accepted to CCS! (first first-author paper)
  • Feb 2017 - AuthentiCall received the Distinguished Poster Award at NDSS 2017.
  • Jun 2016 - I was awarded the Board of Education Fellowship for summer research.
  • Mar 2016 - I decided to continue my education as a Ph.D. student at the University of Florida.


Luis Vargas , Patrick Emami, Patrick Traynor. On the Detection of Disinformation Campaign Activity with Network Analysis. In Proceedings of the 2020 ACM SIGSAC Cloud Computing Security Workshop, CCSW ’20, 2020.

Luis Vargas , Logan Blue, Vanessa Frost, Chritopher Patton, Nolen Scaife, Kevin R.B. Bulter, and Patrick Traynor. Digital Healthcare-Associated Infection: A Case Study on the Security of a Major Multi-Campus Hospital System. In Proceedings of the 2019 Network and Distributed System Security Symposium, NDSS ’19, 2019.
paper, talk

Bradley Reaves, Luis Vargas, Nolen Scaife, Dave Tian, Logan Blue, Patrick Traynor, and Kevin R.B. Butler. Characterizing the Security of the SMS Ecosystem with Public Gateways. ACM Transactions on Privacy and Security (TOPS), 2018.

Luis Vargas, Gyan Hazarika, Rachel Culpepper, Kevin R.B. Bulter, Thomas Shrimpton, Doug Szajda, and Patrick Traynor. Mitigating Risk while Complying with Data Retention Laws. In Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security, CCS ’18, 2018.
paper, talk

Logan Blue, Luis Vargas, and Patrick Traynor. Hello, Is It Me You're Looking For? Differentiating Between Human and Electronic Speakers for Voice Interface Security. In Proceedings of the 11th ACM Conference on Security and Privacy in Wireless and Mobile Networks, 2018.

Logan Blue, Hadi Abdullah, Luis Vargas, and Patrick Traynor. 2MA: Verifying Voice Commands via Two Microphone Authentication. In Proceedings of the 13th ACM Symposium on Information, Computer and Communications Security, ASIACCS ’18, 2018.

Bradley Reaves, Logan Blue, Hadi Abdullah, Luis Vargas, Patrick Traynor, and Tom Shrimpton. AuthentiCall: Efficient Identity and Content Authentication for Phone Calls. In Proceedings of the 26th USENIX Security Symposium, 2017.

Alexander Pons, Andrew De La Rosa, Silvia Vidaurre, Luis Vargas, and Eugene Pons. Security and Privacy Implications of ’Do Not Track’. International Journal of Information Privacy, Security and Integrity, 3(2):117–133, 2017.

The Guy Behind the Keyboard

Outside of my research, I am an outdoor enthusiast looking for the next adventure.

Scuba Diving
Growing up in Florida, I always had the beach no more than a 45-minute drive. This led me to experience a wide range different aquatic activities. However, out of all my experiences, scuba diving has been my favorite. I am currently in the process of obtaining my advanced scuba diving open water certificate!

Though Florida is not known for the its beautiful mountains (that is what we call our few small hills), I do enjoy biking around the few trails we have in the state parks.

Contact Me

lfvargas14 'at' ufl 'dot' edu (business)
lvarg025 'at' gmail 'dot' com (personal)
Curriculum Vitae