Collins Munyendo
CS PhD Candidate at GW
Email: cmunyendo[at]gwu.edu
Publications
2025
Digital Security Perceptions and Practices Around the World: A WEIRD versus Non-WEIRD Comparison F. Herbert*, C.W. Munyendo*, J. Hielscher, S. Becker, and Y. Zou USENIX Security 2025 [URL] [PDF] * co-first authors
Design and Evaluation of Privacy-Preserving Protocols for Agent-Facilitated Mobile Money Services in Kenya K. Sowon, C.W. Munyendo, L. Klucinec, E. Maingi, G. Suleh, L.F. Cranor, G. Fanti, C. Tucker, and A. Gueye SOUPS 2025 (Conditionally Accepted)
"You Have to Ignore the Dangers": User Perceptions of the Security and Privacy Benefits of WhatsApp Mods C.W. Munyendo*, K. Owens*, F. Strong, S. Wang, A.J. Aviv, T. Kohno, and F. Roesner IEEE S&P 2025 [URL] [PDF] * co-first authors
Reimagining Wearable-Based Digital Contact Tracing: Insights from Kenya and Côte d’Ivoire K.S. Niksirat, C.W. Munyendo, O.B.L. Neto, M. Katya, C. Kouassi, K. Ochieng, A. Georgina, B. Olayo, J. Barras, C. Cattuto, A.J. Aviv, and C. Troncoso CHI 2025 [URL] [PDF]
2024
"I'm going to try her birthday": Investigating How Friends Guess Each Other's Smartphone Unlock PINs in the Lab E. Korkes, C.W. Munyendo, A. Isaac, V. Hennemann, and A.J. Aviv EuroUSEC 2024 [URL] [PDF]
Security, Privacy, and Data-sharing Trade-offs When Moving to the United States: Insights from a Qualitative Study M. Tran*, C.W. Munyendo*, H.S. Ramulu*, R.G. Rodriguez, L.B. Schnell, C. Sula, L. Simko, and Y. AcarIEEE S&P 2024 [URL] [PDF] [Video] * co-first authors
It’s Trying Too Hard To Look Real: Deepfake Moderation Mistakes and Identity-Based Bias J. Mink, M. Wei, C.W. Munyendo, K. Hugenberg, T. Kohno, E.M. Redmiles, and G. Wang CHI 2024 [URL] [PDF] [Video]
An Analysis of Password Managers' Password Checkup Tools A. Hutchinson, C.W. Munyendo, P. Mayer, and A.J. Aviv CHI EA 2024 [URL] [PDF] [Video]
2023
"I just stopped using one and started using the other": Motivations, Techniques, and Challenges When Switching Password Managers C.W. Munyendo, P. Mayer, and A.J. AvivCCS 2023 [URL] [PDF]
"Someone Definitely Used 0000": Strategies, Performance, and User Perception of Novice Smartphone-Unlock PIN-Guessers D.V. Bailey, C.W. Munyendo, H.A. Dyer, M. Grant, P. Markert, and A.J. Aviv EuroUSEC 2023 [URL] [PDF]
"In Eighty Percent of the Cases, I Select the Password for Them": Security and Privacy Challenges, Advice, and Opportunities at Cybercafes in Kenya
C.W. Munyendo, Y. Acar, and A.J. Aviv IEEE S&P 2023
[URL]
[PDF]
[Video]
Distinguished Paper Award
2022
User Perceptions of Five-Word Passwords X. Wu, C.W. Munyendo, E. Cosic, G.A. Flynn, O. Legault, and A.J. Aviv ACSAC 2022 [URL] [PDF] [Slides]
"The Same PIN, Just Longer": On the (In)Security of Upgrading PINs from 4 to 6 digits C.W. Munyendo, P. Markert, A. Nisenoff, M. Grant, E. Korkes, B. Ur, and A.J. AvivUSENIX Security 2022 [URL] [PDF] [Video] [Slides]
Why Users (Don’t) Use Password Managers at a Large Educational Institution P. Mayer, C.W. Munyendo, M.L. Mazurek, and A.J. AvivUSENIX Security 2022 [URL] [PDF] [Video] [Slides]
"Desperate Times Call for Desperate Measures": User Concerns with Mobile Loan Apps in Kenya C.W. Munyendo, Y. Acar, and A.J. AvivIEEE S&P 2022 [URL] [PDF] [Video]
2021
Strategies and Perceived Risks of Sending Sensitive Documents N. Warford, C.W. Munyendo, A. Mediratta, A.J. Aviv, and M.L. Mazurek USENIX Security 2021 [URL] [PDF] [Video] [Slides]
Using a Blocklist to Improve the Security of User Selection of Android Patterns C.W. Munyendo, M. Grant, P. Markert, T.J. Forman, and A.J. Aviv SOUPS 2021 [URL] [PDF] [Video] [Slides]