USENIX Association Proceedings of the 28th USENIX Security Symposium August 14–16, 2019 Santa Clara, CA, USA Conference Organizers Program Co-Chairs Daniel Gruss, Graz University of Technology Nadia Heninger, University of Pennsylvania Joseph Lorenzo Hall, Center for Democracy & Technology Patrick Traynor, University of Florida Xiali (Sharon) Hei, University of Louisiana at Lafayette Thorsten Holz, Ruhr-University Bochum Program Committee The Pennsylvania State University Yasemin Acar, Leibniz University Hannover Trent Jaeger, U.S. Naval Research Laboratory Sadia Afroz, University of California, Berkeley/ Rob Jansen, International Computer Science Institute Mobin Javed, Lahore University of Management Sciences Devdatta Akhawe, Dropbox Chris Kanich, University of Illinois at Chicago Johanna Amann, International Computer Science Institute Vasileios Kemerlis, Brown University Adam Aviv, United States Naval Academy Yongdae Kim, Korea Advanced Institute of Science and Technology (KAIST) Michael Bailey, University of Illinois at Urbana–Champaign Google Adam Bates, University of Illinois at Urbana–Champaign Lea Kissner, University of Washington Vincent Bindschaedler, University of Florida Yoshi Kohno, University of California, San Diego Joseph Bonneau, New York University Farinaz Koushanfar, CISPA Helmholtz Center i.G. Nikita Borisov, University of Illinois at Urbana–Champaign Katharina Krombholz, Google Sven Bugiel, CISPA Helmholtz Center i.G. Ben Laurie, Google Kevin Butler, University of Florida Tancrède Lepoint, Technische Universität Wien Joe Calandrino, Federal Trade Commission Martina Lindorfer, Salesforce Stefano Calzavara, Università Ca’ Foscari Venezia Allison Mankin, Oxford University Yinzhi Cao, Johns Hopkins University Ivan Martinovic, University of Minnesota Srdjan Capkun, ETH Zurich Stephen McCamant, Google Lorenzo Cavallaro, King’s College London Jon McCune, The Pennsylvania State University Stephen Checkoway, Oberlin College Patrick McDaniel, University College London Bill Cheswick, AT&T Labs—Research Sarah Meiklejohn, USC/Information Sciences Institute Marshini Chetty, Princeton University Jelena Mirkovic, Princeton University Mihai Christodorescu, VISA Research Prateek Mittal, Utrecht University Erinn Clark, First Look Media Veelasha Moonsamy, College of William & Mary George Danezis, University College London Adwait Nadkarni, Ben-Gurion University of the Negev Nathan Dautenhahn, Rice University Yossi Oren, The Pennsylvania State University Roger Dingledine, The Tor Project Nicolas Papernot, Royal Holloway Adam Doupe, Arizona State University Kenny Paterson, École Polytechnique Fédérale de Lausanne Thomas Dullien, Google Mathias Payer, (EPFL) Zakir Durumeric, Stanford University Giancarlo Pellegrino, Stanford University Manuel Egele, Boston University Christina Pöpper, New York University Abu Dhabi William Enck, North Carolina State University Brad Reaves, North Carolina State University Roya Ensafi, University of Michigan Elissa Redmiles, University of Maryland David Evans, University of Virginia Konrad Rieck, Technische Universität Braunschweig Sascha Fahl, Leibniz University Hannover Tom Ristenpart, Cornell Tech Giulia Fanti, Carnegie Mellon University Tom Ritter, Mozilla Nick Feamster, Princeton University Franziska Roesner, University of Washington Adrienne Porter Felt, Google Ahmad-Reza Sadeghi, Technische Universität Darmstadt Earlence Fernandes, University of Washington Prateek Saxena, National University of Singapore David Freeman, Facebook Nolen Scaife, University of Florida Daniel Genkin, University of Michigan Wendy Seltzer, W3C/Massachusetts Institute of Technology Neil Gong, Iowa State University Micah Sherr, Georgetown University Matthew Green, Johns Hopkins Information Security Institute Deian Stefan, University of California, San Diego CISPA Helmholtz Center i.G. Rachel Greenstadt, Drexel University Ben Stock, Gianluca Stringhini, Boston University Dave ‘Jing’ Tian, University of Florida Poster Session Chair Luke Valenta, University of Pennsylvania Brad Reaves, North Carolina State University Ingrid Verbauwhede, Katholieke Universiteit Leuven Test of Time Awards Committee David Wagner, University of California, Berkeley Matt Blaze, University of Pennsylvania Byron Williams, University of Florida Dan Boneh, Stanford University Eric Wustrow, University of Colorado Boulder Kevin Fu, University of Michigan Wenyuan Xu, Zhejiang University Fabian Monrose, The University of North Carolina at Yuval Yarom, University of Adelaide and Data61 Chapel Hill Tuba Yavuz, University of Florida Daniel Zappala, Brigham Young University Steering Committee Mary Ellen Zurko, MIT Lincoln Laboratory Matt Blaze, University of Pennsylvania Dan Boneh, Stanford University Invited Talks Chair William Enck, North Carolina State University Devdatta Akhawe, Dropbox Kevin Fu, University of Michigan Invited Talks Committee Casey Henderson, USENIX Association Alex Gantman, Qualcomm Thorsten Holz, Ruhr-Universität Bochum Giancarlo Pellegrino, Stanford University Jaeyeon Jung, Samsung Electronics Elissa Redmiles, University of Maryland Engin Kirda, Northeastern University Tadayoshi Kohno, University of Washington Lightning Talks Chair Adrienne Porter Felt, Google Christina Garman, Purdue University Thomas Ristenpart, Cornell Tech David Wagner, University of California, Berkeley External Reviewers Hadi Abdullah Joel Frank Sebastian Lauer Will Scott Bander Alsulami Vanessa Frost Kevin Liao Karn Seth Cornelius Aschermann Ankit Gangwal Moritz Lipp Hovav Shacham Teodora Baluta Peng Gao Alwin Maier Rich Shay Gabrielle Beck Washington Garcia Patrick McCorry Shiqi Shen Logan Blue Jordy Gennissen Robert Merget Tom Shrimpton Nicole Borrelli Lukas Giner Muhammad Shujaat Mirza Camelia Simoiu Sam Bretheim Steve Gomez Rafael Misoczki Douglas Stebila Marcus Brinkmann Martin Grothe Vladislav Mladenov Mohammad Taha Khan Claudio Canella Muhammad Haris Ivica Nikolic Kejsi Take Benton Case Mughees Liang Niu Dennis Tatang Berkay Celik Marcella Hastings Aleatha Parker-Wood Aaron Tomb Alishah Chator Grant Hernandez Paul Pearce Mathy Vanhoef Rahul Chatterjee Grant Ho Feargus Pendlebury Luis Vargas Qingrong Chen Stefan Hoffmann Mike Perry Liang Wang Joseph Choi Liz Izhikevich Fabio Pierazzi Alexander Warnicke David Clayton Sakshi Jain Ania Piotrowska Christian Wressnegger Shaanan Cohney Tyler Kaczmarek Erwin Quiring Karl Wüst Edwin Dauber George Kappos Sanjeev Reddy Xiaojun Xu Giulio De Pasquale Gabrielle Kaptchuk Paul Rösler Nian Xue Sergi Delgado Segura Katarina Kohls David Rupprecht Haaroon Yousaf Henri Maxime Demoulin Aashish Kolluri M. Sadegh Riazi Pinghai Yuan Brian Desnoyers Georg Koppen Theodor Schnitzler Yupeng Zhang Karim Eldefrawy Ben Kreuter Ser gej Schu mi lo Maximilian Zinkus Evan Evtimov Deepak Kumar Roei Schuster Dennis Felsch Daniele Lain Michael Schwarz.