In the schedule below, we list show the times (and dates) of the sessions in your local timezone.

NOTE: The week of IMC lies between when much of the world switches from daylight savings time to standard time (October 31, 2021) and when the United States does (November 7, 2021). The calculation of session times and time zones below takes this into account.

NOTE: All accepted papers can be found in the ACM Digital Library.

Every paper is allocated 7 minutes (short papers) or 10 minutes (long papers) for a recorded presentation. This will be followed by 3 minutes (short papers) or 5 minutes (long papers) of live Q&A, moderated by the session chair. There are short breaks built in between most sessions. Additionally, there are dedicated “author interaction” sessions where the authors of papers from the immediately previous sessions will be available in a dedicated channel for additional questions and conversations.

Day 1

Opening Remarks

• Opening Remarks

Session 1: Characterizing and Measuring Networks

Session Chair: Fabian Bustamante

• Examination of WAN traffic characteristics in a large-scale data center network (video) Zhaohua Wang, Zhenyu Li (University of Chinese Academy of Sciences); Guangming Liu, Yunfei Chen (Baidu); Qinghua Wu (University of Chinese Academy of Sciences); Gang Cheng (Baidu)

• AutoSens: inferring latency sensitivity of user activity through natural experiments (video) Parth Thakkar (University of Illinois, Urbana-Champaign); Rohan Saxena (CMU); Venkata N. Padmanabhan (Microsoft Research India)

• Federated infrastructure: usage, patterns, and insights from “the people’s network” (video) Dhananjay Jagtap, Alex Yen, Huanlei Wu, Aaron Schulman, Pat Pannuto (UC San Diego)

Session 2: Cloud

Session Chair: Alex Marder

• From cloud to edge: a first look at public edge platforms (video) Mengwei Xu (Beijing University of Posts and Telecommunications); Zhe Fu (Tsinghua University); Xiao Ma, Li Zhang, Yanan Li (Beijing University of Posts and Telecommunications); Feng Qian (University of Minnesota - Twin Cities); Shangguang Wang (Beijing University of Posts and Telecommunications); Ke Li, Jingyu Yang (Unaffiliated); Xuanzhe Liu (Peking University)

• Measuring the network performance of Google cloud platform (video) Ricky K. P. Mok (CAIDA/UC San Diego); Hongyu Zou (UC San Diego); Rui Yang (ETH Zurich); Tom Koch, Ethan Katz-Bassett (Columbia University); kc claffy (CAIDA/UC San Diego)

• Cloudy with a chance of short RTTs: analyzing cloud connectivity in the internet (video) The Khang Dang, Nitinder Mohan (Technical University Munich); Lorenzo Corneo, Aleksandr Zavodovski (Uppsala University); Jorg Ott (Technische Universität München); Jussi Kangasharju (University of Helsinki)

Author Interaction (sessions 1 and 2)

Session 3: Measurement and Modeling

Session Chair: Aaron Schulman

• Unbiased experiments in congested networks (video) Bruce Spang (Stanford University); Veronica Hannan, Shravya Kunamalla, Te-Yuan Huang (Netflix); Nick McKeown, Ramesh Johari (Stanford University)

• Revisiting TCP congestion control throughput models & fairness properties at scale (video) Adithya Abraham Philip, Ranysha Ware, Rukshani Athapathu, Justine Sherry, Vyas Sekar (Carnegie Mellon University)

• Precise error estimation for sketch-based flow measurement (video) Peiqing Chen (Boston University); Yuhan Wu, Tong Yang (Peking University); Junchen Jiang (University of Chicago); Zaoxing Liu (Boston University)

Session 4: Protocols

Session Chair: Giovane C. M. Moura

• Who’s got your mail?: characterizing mail service provider usage (video) Enze Liu, Gautam Akiwate (UC San Diego); Mattijs Jonker (University of Twente); Ariana Mirian, Stefan Savage, Geoffrey M. Voelker (UC San Diego)

• Characterising the IETF through the lens of RFC deployment (video) Stephen McQuistin (University of Glasgow); Mladen Karan, Prashant Khare (Queen Mary University of London); Colin Perkins (University of Glasgow); Gareth Tyson, Matthew Purver, Patrick Healey, Waleed Iqbal (Queen Mary University of London); Junaid Qadir (Information Technology University); Ignacio Castro (Queen Mary University of London)

• Third time’s not a charm: exploiting SNMPv3 for router fingerprinting (video) Taha Albakour (TU Berlin); Oliver Gasser (Max Planck Institute for Informatics); Robert Beverly (Naval Postgraduate School); Georgios Smaragdakis (TU Delft)

Author Interaction (sessions 3 and 4)

Session 5: IoT and TLS

Session Chair: Mattijs Jonker

• IoTLS: understanding TLS usage in consumer IoT devices (video) Muhammad Talha Paracha, Daniel J. Dubois (Northeastern University); Narseo Vallina-Rodriguez (IMDEA Networks / ICSI / AppCensus Inc.); David Choffnes (Northeastern University)

• Tracing your roots: exploring the TLS trust anchor ecosystem (video) Zane Ma (Georgia Institute of Technology); James Austgen, Joshua Mason (University of Illinois at Urbana-Champaign); Zakir Durumeric (Stanford University); Michael Bailey (University of Illinois at Urbana Champaign)

• Open for hire: attack trends and misconfiguration pitfalls of IoT devices (video) Shreyas Srinivasa, Jens Myrup Pedersen, Emmanouil Vasilomanolakis (Aalborg University, Denmark)

Session 6: Video

Session Chair: Aruna Balasubramanian

• Can you see me now?: a measurement study of Zoom, Webex, and Meet (video) Hyunseok Chang, Matteo Varvello, Fang Hao, Sarit Mukherjee (Nokia Bell Labs)

• Measuring the performance and network utilization of popular video conferencing applications (video) Kyle MacMillan, Tarun Mangla, James Saxon, Nick Feamster (University of Chicago)

• The shape of view: an alert system for video viewership anomalies ([video](https://youtu.be/DiTgHlIUpvw Antonis Manousis (Carnegie Mellon University); Harshil Shah, Yan Li, Henry Milner (CONVIVA); Hui Zhang (Carnegie Mellon University/CONVIVA); Vyas Sekar (Carnegie Mellon University)

Author Interaction (sessions 5 and 6)

Day 2

Session 7: HTTP and QUIC

Session Chair: Anja Feldmann

• It’s over 9000: analyzing early QUIC deployments with the standardization on the horizon (video) Johannes Zirngibl, Philippe Buschmann, Patrick Sattler, Benedikt Jaeger, Juliane Aulbach, Georg Carle (Technical University of Munich)

• Web censorship measurements of HTTP/3 over QUIC (video) Kathrin Elmenhorst, Bertram Schuetz (Osnabrück University); Simone Basso (Open Observatory of Network Interference); Nils Aschenbruck (Osnabrück University)

• QUICsand: quantifying QUIC reconnaissance scans and DoS flooding events (video) Marcin Nawrocki (Freie Universität Berlin); Raphael Hiesgen, Thomas C. Schmidt (HAW Hamburg); Matthias Wählisch (Freie Universität Berlin)

• Sharding and HTTP/2 connection reuse revisited: why are there still redundant connections? (video) Constantin Sander, Leo Blöcher, Klaus Wehrle, Jan Rüth (RWTH Aachen University)

Session 8: Blockchain and DeFi

Session Chair: Alan Mislove

• TopoShot: uncovering Ethereum’s network topology leveraging replacement transactions (video) Kai Li, Yuzhe Tang, Jiaqi Chen, Yibo Wang, Xianghong Liu (Syracuse University)

• Selfish & opaque transaction ordering in the Bitcoin blockchain: the case for chain neutrality (video) Johnnatan Messias, Mohamed Alzayat (MPI-SWS); Balakrishnan Chandrasekaran (Vrije Universiteit Amsterdam); Krishna P. Gummadi (MPI-SWS); Patrick Loiseau (Univ. Grenoble Alpes, Inria, CNRS, Grenoble INP, LIG); Alan Mislove (Northeastern University)

• An empirical study of DeFi liquidations: incentives, risks, and instabilities (video) Kaihua Qin, Liyi Zhou, Pablo Gamito (Imperial College London); Philipp Jovanovic (University College London); Arthur Gervais (Imperial College London)

Author Interaction (sessions 7 and 8)

Poster Session

Session 9: Performance and Tools

Session Chair: Matthew Luckie

• Measuring DNS-over-HTTPS performance around the world (video) Rishabh Chhabra, Paul Murley (University of Illinois at Urbana-Champaign); Deepak Kumar (Stanford University); Michael Bailey, Gang Wang (University of Illinois at Urbana-Champaign)

• TRAGEN: a synthetic trace generator for realistic cache simulations Community Contribution Award (video) Anirudh Sabnis (UMass Amherst); Ramesh Sitaraman (UMass Amherst & Akamai Tech)

• HLISA: towards a more reliable measurement tool (video) Daniel Goßen (Radboud University); Hugo Jonker (Open University + Radboud University); Stefan Karsch (TH Köln); Benjamin Krumnow (TH Köln + Open University); David Roefs (Radboud University)

Session 10: DNS Attacks

Session Chair: Taejoong Chung

• Home is where the hijacking is: understanding DNS interception by residential routers (video) Audrey Randall, Enze Liu (UC San Diego); Ramakrishna Padmanabhan (CAIDA, UC San Diego); Gautam Akiwate, Geoffrey M. Voelker, Stefan Savage, Aaron Schulman (UC San Diego)

• TsuNAME: exploiting misconfiguration and vulnerability to DDoS DNS (video) Giovane C. M. Moura (SIDN Labs); Sebastian Castro (InternetNZ); John Heidemann, Wes Hardaker (University of Southern California / Information Sciences Institute)

• The far side of DNS amplification: tracing the DDoS attack ecosystem from the internet core (video) Marcin Nawrocki (Freie Universität Berlin); Mattijs Jonker (University of Twente); Thomas C. Schmidt (HAW Hamburg); Matthias Wählisch (Freie Universität Berlin)

Author Interaction (sessions 9 and 10)

Session 11: Information and Misinformation

Session Chair: Duane Wessels

• Throttling Twitter: an emerging censorship technique in Russia (video) Diwen Xue, Reethika Ramesh (University of Michigan); ValdikSS, Leonid Evdokimov, Andrey Viktorov (Independent); Arham Jain (University of Michigan); Eric Wustrow (University of Colorado Boulder); Simone Basso (Open Observatory of Network Interference); Roya Ensafi (University of Michigan)

• Understanding engagement with U.S. (mis)information news sources on Facebook (video) Laura Edelson (NYU); Minh-Kha Nguyen (Univ. Grenoble Alpes); Ian Goldstein (NYU); Oana Goga (Univ. Grenoble Alpes, CNRS, Inria, Grenoble INP, LIG); Damon McCoy, Tobias Lauinger (NYU)

• Unique on Facebook: formulation and evidence of (nano)targeting individual users with non-PII data (video) José González-Cabañas, Ángel Cuevas, Rubén Cuevas (Universidad Carlos III de Madrid); Juan López-Fernández (GTD System & Software Engineering); David García (Graz University of Technology)

Session 12: COVID and Current Affairs

Session Chair: David Choffnes

• Locked-in during lock-down: undergraduate life on the internet in a pandemic (video) Alisha Ukani, Ariana Mirian, Alex C. Snoeren (UC San Diego)

• Networked systems as witnesses: association between content demand, human mobility and an infection spread (video) Sana Asif, Byungjin Jun, Fabián E. Bustamante (Northwestern University); John P. Rula (Akamai)

• Polls, clickbait, and commemorative $2 bills: problematic political advertising on news and media websites around the 2020 U.S. elections (video) Eric Zeng, Miranda Wei, Theo Gregersen, Tadayoshi Kohno, Franziska Roesner (University of Washington)

Author Interaction (sessions 11 and 12)

Business Meeting

• Business Meeting

Day 3

Session 13: Web

Session Chair: Gareth Tyson

• Who you gonna call?: an empirical evaluation of website security.txt deployment (video) Tara Poteat, Frank Li (Georgia Institute of Technology)

• Understanding the performance of webassembly applications (video) Yutian Yan (University at Buffalo, SUNY); Tengfei Tu, Lijian Zhao, Yuchen Zhou (Beijing University of Posts and Telecommunications); Weihang Wang (University at Buffalo, SUNY)

• Knock and talk: investigating local network communications on websites (video) Dhruv Kuchhal, Frank Li (Georgia Institute of Technology)

• TrackerSift: untangling mixed tracking and functional web resources (video) Abdul Haddi Amjad (Virginia Tech); Danial Saleem (FAST-NUCES); Muhammad Ali Gulzar (Virginia Tech); Zubair Shafiq (University of California, Davis); Fareed Zaffar (LUMS)

Session 14: Autonomous Systems and BGP

Session Chair: Ethan Katz-Bassett

• AS-level BGP community usage classification (video) Thomas Krenc, Robert Beverly (Naval Postgraduate School); Georgios Smaragdakis (TU Delft)

• The parallel lives of autonomous systems: ASN allocations vs. BGP (video) Eugenio Nerio Nemmi, Francesco Sassi, Massimo La Morgia (Sapienza University of Rome); Cecilia Testart (Massachusetts Institute of Technology); Alessandro Mei (Sapienza University of Rome); Alberto Dainotti (CAIDA, UC San Diego)

• How biased is our validation (data) for AS relationships? (video) Lars Prehn (MPII); Anja Feldmann (MPI)

Session 15: Analyzing Platforms and Applications

Session Chair: Juan Tapiador

• A large-scale characterization of online incitements to harassment across platforms (video) Max Aliapoulios, Kejsi Take, Prashanth Ramakrishna (New York University); Daniel Borkan, Beth Goldberg, Jeffrey Sorensen, Anna Turner (Jigsaw); Rachel Greenstadt, Tobias Lauinger, Damon McCoy (New York University)

• RacketStore: measurements of ASO deception in Google play via mobile and app usage (video) Nestor Hernandez (MathWorks); Ruben Recabarren, Bogdan Carbunar (Florida International University); Syed Ishtiaque Ahmed (University of Toronto)

• Smart at what cost?: characterising mobile deep neural networks in the wild (video) Mario Almeida, Stefanos Laskaridis, Abhinav Mehrotra, Lukasz Dudziak, Ilias Leontiadis (Samsung AI Center Cambridge); Nic Lane (University of Cambridge and Samsung AI)

Author Interaction (sessions 13, 14, and 15)

Session 16: Autonomous Systems and Name Management

Session Chair: Rob Beverly

• Risky BIZness: risks derived from registrar name management (video) Gautam Akiwate, Stefan Savage, Geoffrey M. Voelker (UC San Diego); kc claffy (CAIDA / UC San Diego)

• Identifying ASes of state-owned internet operators (video) Esteban Carisimo (Northwestern University); Alexander Gamero-Garrido (UC San Diego / CAIDA); Alex C. Snoeren (UC San Diego); Alberto Dainotti (CAIDA / UC San Diego)

• ASdb: a system for classifying owners of autonomous systems (video) Maya Ziv, Liz Izhikevich, Kimberly Ruth (Stanford University); Katherine Izhikevich (UC San Diego); Zakir Durumeric (Stanford University)

Session 17: Characterizing and Measuring Networks

Session Chair: Zachary Bischof

• Inferring regional access network topologies: methods and applications (video) Zesen Zhang (UC San Diego); Alexander Marder, Ricky Mok, Bradley Huffaker (CAIDA / UC San Diego); Matthew Luckie (University of Waikato); kc claffy (CAIDA / UC San Diego); Aaron Schulman (UC San Diego)

• Follow the scent: defeating IPv6 prefix rotation privacy Best Paper Award (video) Erik Rye (CMAND); Robert Beverly (Naval Postgraduate School); kc claffy (CAIDA / UC San Diego)

• Towards identifying networks with internet clients using public data (video) Weifan Jiang, Tao Luo, Thomas Koch, Yunfan Zhang, Ethan Katz-Bassett (Columbia University); Matt Calder (Microsoft/Columbia University)

Author Interaction (sessions 16 and 17)

Coffee Break Chat

No Presentation

• Corrigendum: cloud provider connectivity in the flat internet Todd Arnold, Jia He, Weifan Jiang (Columbia University), Matt Calder (Microsoft and Columbia University), Italo Cunha (Universidade Federal de Minas Gerais and Columbia University), Vasileios Giotsas (Lancaster University), Ethan Katz-Bassett (Columbia University)