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Ricky K. P. Mok (莫嘉沛)
About me
About me
I am currently an associate research scientist in CAIDA/UC San Diego. I received my Ph.D. (Computer Science) from the Department of Computing at the Hong Kong Polytechnic University and B.Eng. (Major in Computer Engineering, minor in Spanish) from the Department of Computer Science and Engineering at the Chinese University of Hong Kong in 2016 and 2009, respectively. My research interest includes network measurement, Internet data science, cyber-security, HTTP streaming system, quality of experience (QoE) measurement, and reliable crowdsourcing-based QoE assessment methods.
During my leisure time, I play cello and brew good cups of coffee. Before joining CAIDA, I was the principal cello of the Hong Kong City Chinese Music Orchestra and the conductor of Tune of Pandora. I am a holder of DipABRSM in performance (cello), NRA certified instructor (BoPS, PPITH, PPOTH), and City & Guilds International Award in Barista Skills.
My family currently has two rescue dogs from South Korea supervised by a Mini Rex bunny. Welcome to follow their them on Facebook.
CAIDA is looking for visiting Ph.D. students, UCSD CSE graduate students, and postdoctoral scholars on the topic of network measurements, cyber-security, Internet data analytics, and 5G measurements (see CAIDA's funding and projects page for more details). If you are interested to join us, please feel free to send me an email. For UCSD undergraduate students, you can find and apply our REU job cards posted on UCSD Handshake.
Publications
Publications
2025
2025
Hammas Bin Tanveer, Echo Chan, Ricky K. P. Mok, Sebastian Kappes, Philipp Richter, Oliver Gasser, John Ronan, Arthur Berger, and kc claffy, "Unveiling IPv6 Scanning Dynamics: A Longitudinal Study Using Large Scale Proactive and Passive IPv6 Telescopes", Accepted by ACM CoNEXT, 2025.
Alexander Männel, Jonas Mücke, kc claffy, Max Gao, Ricky K. P. Mok, Marcin Nawrocki, Thomas C. Schmidt, and Matthias Wählisch, "Lessons learned from operating a large network telescope", Accepted by ACM SIGCOMM, 2025.
Echo Chan, Ricky K. P. Mok, Edmond W. W. Chan, and Xiapu Luo, "Analyzing Internet background radiation with reflective network telescopes", In ACM/IRTF ANRW, 2025. [paper]
Bernhard Degen, Ben Du, Ricky K. P. Mok, Raffaele Sommese, Mattijs Jonker, Roland van Rijswijk-Deij, kc claffy, "From Scarcity to Opportunity: Examining Abuse of the IPv4 Leasing Market", In IFIP TMA, 2025. [paper]
Matthew Luckie, Shivani Hariprasad, Raffaele Sommese, Brendon Jones, Ricky K. P. Mok, and kc claffy, "An Integrated Active Measurement Programming Environment", In PAM, 2025. [paper]
Tzu-Bin Yan, Zesen Zhang, Bradley Huffaker, Ricky K. P. Mok, kc claffy, and Kirill Levchenko, "Marionette Measurement: Measurement Support under the PacketLab Model", In PAM, 2025. [paper]
Nik Sultana, Hyunsuk Bang, Elena Yulaeva, Ricky K. P. Mok, kc claffy, Richard Mortier, "Survey on Packet Filtering", ACM CCR Vol. 54(3) p. 2-9 , 2025. [paper]
2024
2024
Max Gao, Ricky K. P. Mok, Esteban Carisimo, kc claffy, Eric Li, and Shubham Kulkarni, "DarkSim: A similarity-based time-series analytic framework for darknet traffic", In ACM IMC, 2024. [paper]
Raphael Hiesgen, Marcin Nawrocki, Marinho Barcellos, Daniel Kopp, Oliver Hohlfeld, Echo Chan, Roland Dobbins, Christian Doerr, Christian Rossow, Daniel R. Thomas, Mattijs Jonker, Ricky K. P. Mok, Xiapu Luo, John Kristoff, Thomas Schmidt, Matthias Wählisch, KC Claffy, "The Age of DDoScovery: An Empirical Comparison of Industry and Academic DDoS Assessments", In ACM IMC, 2024. [paper]
Zesen Zhang, Jiting Shen, Ricky K. P. Mok, "Empirical Characterization of Ookla's Speed Test Platform: Analyzing Server Deployment, Policy Impact, and User Coverage", In IEEE CCWC, 2024. [paper]
2023
2023
Tzu-Bin Yan, Zesen Zhang, Bradley Huffaker, Ricky Mok, kc claffy, and Kirill Lavchenko, "Poster: Empirically Testing the PacketLab Model", In ACM IMC (poster section), 2023.
Alexander Marder, Zesen Zhang, Ricky K. P. Mok, Ramakrishna Padmanabhan, Bradley Huffaker, Matthew Luckie, Alberto Dainotti, kc claffy, Alex C. Snoeren, Aaron Schulman, "Access Denied: Assessing Physical Risks to Internet Access Networks", In USENIX Security, 2023.
2022
2022
Tzu-Bin Yan, Michael Chen, Anthea Chen, Zesen Zhang, Bradley Huffaker, Ricky K. P. Mok, Kirill Levchenko, kc claffy, "PacketLab - Tools Alpha Release and Demo", In ACM IMC (poster session), 2022.
Max Gao, Ricky K. P. Mok, kc Claffy, "A Scalable Network Event Detection Framework for Darknet Traffic", In ACM IMC (poster session), 2022.
Rui Yang , Ricky K. P. Mok, Shuohan Wu, Xiapu Luo, Hongyu Zou, Weichao Li, "Design and Implementation of Web-based Speed Test Analysis Tool Kit", In PAM, 2022.
Esteban Carisimo, Ricky K. P. Mok, kc claffy, David D. Clark, "Jitterbug: A new framework for jitter-based congestion inference", In PAM, 2022.
2021
2021
Zesen Zhang, Alexander Marder, Ricky K. P. Mok, Bradley Huffaker, Matthew Luckie, K.C. Claffy, Aaron Schulman, "Inferring Regional Access Network Topologies: Methods and Applications", In ACM IMC, 2021.
Ricky K. P. Mok, Hongyu Zou, Rui Yang, Tom Koch, Ethan Katz-Bassett, kc claffy, "Measuring the network performance of Google Cloud Platform", In ACM IMC, 2021.
2020
2020
Ricky K. P. Mok, kc claffy, "Measuring the impact of COVID-19 on cloud network performance", In IAB COVID-19 Network Impacts Workshop, 2020.
Ricky K. P. Mok, Ginga Kawaguti, Jun Okamoto, "Improving the Efficiency of QoE Crowdtesting", In ACM QoEVMA, 2020.
Che Zhang, Shiwei Zhang, Yi Wang, Weichao Li, Bo Jin, Ricky K. P. Mok, Qing Li, Hong Xu, "Scalable Traffic Engineering for Higher Throughput in Heavily-loaded Software Defined Networks", In IFIP/IEEE NOMS mini-conference session, 2020.
Roderick Fanou, Bradley Huffaker, Ricky K. P. Mok, KC Claffy, "Unintended consequences: Effects of submarine cable deployment on Internet routing", In PAM, 2020. (Best paper award)
Adnan Ahmed, Ricky K. P. Mok, Zubair Shafiq, "FlowTrace: A Framework for Active Bandwidth Measurements using In-band Packet Trains", In PAM, 2020.
2019
2019
Ricky K. P. Mok, Ginga KAWAGUTI, kc claffy, "QUINCE: A Unified Crowdsourcing-based QoE Measurement Platform", In ACM SIGCOMM poster session, 2019.
Rajarshi Bhattacharyya, Archana Bura, Desik Rengarajan, Mason Rumuly, Srinivas Shakkottai, Dileep Kalathil, Ricky K. P. Mok, Amogh Dhamdhere, "QFlow: A Reinforcement Learning Approach to High QoE Video Streaming over Wireless Networks", In ACM MobiHoc, 2019.
Shiwei Zhang, Weichao Li, Daoyuan Wu, Bo Jin, Rocky K. C. Chang, Debin Gao, Yi Wang, Ricky K. P. Mok, "An empirical study of mobile network behavior and application performance in the wild", In IEEE IWQoS, 2019.
2018
2018
Amogh Dhamdhere, David D. Clark, Alexander Gamero-Garrido, Matthew Luckie, Ricky K. P. Mok, Gautam Akiwate, Kabir Gogia, Vaibhav Bajpai, Alex C. Snoeren, kc claffy, "Inferring Persistent Interdomain Congestion", In ACM SIGCOMM, 2018. (Best paper award)
Ricky K. P. Mok, Vaibhav Bajpai, Amogh Dhamdhere, kc claffy, "Revealing the load balancing behavior of YouTube traffic on interdomain links", In PAM, March 2018.
2017
2017
Weichao Li, Daoyuan Wu, Rocky K. C. Chang, Ricky K. P. Mok, "Toward Accurate Network Measurement on Android Phones", IEEE Transactions on Mobile Computing, vol. 17(3) p.717-732.
Ricky K. P. Mok, Rocky K. C. Chang, Weichao Li, "Detecting low-quality workers in QoE crowdtesting: A worker behavior based approach", IEEE Transactions on Multimedia vol. 19(3) p.530-543.
2016
2016
Weichao Li, Daoyuan Wu, Rocky K. C. Chang, Ricky K. P. Mok, "Demystifying and Puncturing the Inflated Delay in Smartphone-based WiFi Network Measurement", In ACM CoNEXT, December 2016.
Ricky K. P. Mok, Weichao Li, Rocky K. C. Chang, "IRate: Initial Video Bitrate Selection System for HTTP Streaming", Poster: In Proc. USENIX NSDI (Poster and Demo Session), April 2013. Journal: IEEE Journal on Selected Areas in Communications vol. 34(6) p.1914-1928.
Towards a QoE-aware video streaming system. Ph.D. Thesis. 2016. Advisor: Prof. Rocky K. C. Chang, Chairman of the Broad of Examiners: Prof. Jane You, External examiners: Prof. Dah Ming Chiu and Prof. Yong Liu
2011-2015
2011-2015
Ricky K. P. Mok, Weichao Li, Rocky K. C. Chang, Kwok-Wun Yung, Ching-Ho Chan, Yat-Sing Poon, “An automated testbed for profiling the packet send-time accuracy of embedded devices”, In TRIDENTCOM (Poster Session), June 2015.
Ricky K. P. Mok, Weichao Li, Rocky K. C. Chang, "Detecting low-quality crowdtesting workers", In IEEE/ACM IWQoS, June 2015.
Weichao Li, Ricky K. P. Mok, Daoyuan Wu, Rocky K. C. Chang, "On the Accuracy of Smartphone-based Mobile Network Measurement", In IEEE INFOCOM, May 2015.
Ricky K. P. Mok, Weichao Li, Rocky K. C. Chang, "Improving the packet send-time accuracy in embedded devices", In PAM, March 2015.
Ricky K. P. Mok, Weichao Li, Rocky K. C. Chang, "A user behavior based cheat detection mechanism for crowdtesting", In ACM SIGCOMM (Poster and Demo Session), August 2014.
Weichao Li, Ricky K. P. Mok, Rocky K. C. Chang, and Waiting W. T. Fok, "Appraising the Delay Accuracy in Browser-based Network Measurement", In ACM IMC, October 2013.
Lei Xue, Ricky K. P. Mok, Rocky K. C. Chang, "OMWare: An Open Measurement Ware for Stable Residential Broadband Measurement", In ACM SIGCOMM (Poster and Demo Session), August 2013.
Waiting W. T. Fok, Xiapu Luo, Ricky K. P. Mok, Weichao Li, Rocky K. C. Chang, Yujing Liu, Edmond W. W. Chan, "MonoScope: Automating Network Faults Diagnosis Based on Active Measurements", In IFIP/IEEE IM, May 2013.
Ricky K. P. Mok, Xiapu Luo, Edmond W. W. Chan, Rocky K. C. Chang, "QDASH: A QoE-aware DASH system", In ACM MMSys, February 2012.
Ka-Chun Wong, Chun-Ho Wu, Ricky K. P. Mok, Chengbin Peng, Zhaolei Zhang, "Evolutionary Multimodal Optimization using The Principle of Locality.", Information Sciences, vol. 194 p.138-170.
Edmond W. W. Chan, Ang Chen, Xiapu Luo, Ricky K. P. Mok, Weichao Li, and Rocky K. C. Chang, "TRIO: Measuring Asymmetric Capacity with Three Minimum Round-trip Times", In ACM CoNEXT, December 2011.
Ricky K. P. Mok, Edmond W. W. Chan, Xiapu Luo, and Rocky K. C. Chang, "Inferring the QoE of HTTP Video Streaming from User-Viewing Activities", In ACM SIGCOMM Workshop on Measurements Up the STack (W-MUST), August 2011.
Ricky K. P. Mok, Edmond W. W. Chan, and Rocky K. C. Chang, "Measuring the Quality of Experience of HTTP Video Streaming", In IFIP/IEEE IM (Pre-conf Session), May 2011.
Funding and grants
Funding and grants
Current funding
Current funding
iVoyager: Internet Voyager for gathering cyber threat intelligence. NSF CNS-2450552 (PI, Project cost: $1,600,000)
CANIS: Curated AI-ready Network telescope datasets for Internet Security. NSF OAC-2531134 (PI, Project cost: $900,000)
ESCALATE: Engaging Scholars in Cybersecurity Analysis: A Laboratory for Teaching and Education. NSF OAC-2519416 (co-PI, Project cost: $698,304)
RABBITS: A measurement toolkit for Reproducible Assessment of BroadBand Internet Topology and Speed. NSF CNS-2323219 (PI, Project cost: $599,035)
STARNOVA: Scalable Technology to Accelerate Research Network Operations Vulnerability Alerts. NSF OAC-2319959 (PI, Project cost: $1,199,994)
Detection and Analysis of Infrastructure Bottlenecks in a Cloud-Centric Internet. NSF CNS-2212241 (PI, Project cost: $1,092,000)
Automated Verification Of Internet Data-paths for 5G. NSF ITE-2326928 (co-PI, Project cost: $5,000,000)
Past funding and grants
Past funding and grants
5G Traffic Sovereignty: Operating Through an Adversarial Internet. NSF ITE-2226460 (co-PI, Project cost: $749,999)
A Unified Approach to Internet Performance Measurement. NSF CNS-2133452 (PI, Project cost: $495,000)
Design and Implementation of speed test over HTTP/3. Comcast Innovation Fund 2020 (PI, Project cost: $50,000)
Improving Capabilities to Measure the Robustness of Critical Communications Infrastructure: A Case Study of COVID-19 Quarantine-Induced Internet Performance. NSF CNS-2028506 May-October 2020 (PI, Project cost: $137,578)
Evaluating web-based speed tests across high-speed access links. Comcast Innovation Fund 2019 (PI, Project cost: $100,000)
A reactive crowdsourcing-based QoE monitoring platform. Nippon Telegraph and Telephone 2017-2019 (PI, Project cost: $162,440, site)
Contact
Contact
Research Group
Research Group
Contact
Contact
cskpmok[AT]caida<dot>org
mail[AT]rmok<dot>pw
CAIDA's Mattermost: @ricky
Amateur radio call sign: KK7PHS
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