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Zhijing Li
I am a research scientist at Facebook. I work on ads ranking ML modeling.
I completed my Ph.D. from the Department of Computer Science at UC Santa Barbara in June, 2019, where I was co-advised by Prof. Ben Y. Zhao and Prof. Heather Zheng. I was a visiting scholar of University of Chicago in 2018 and 2019, working in SAND Lab. I received my Bachelor's degree from the Department of Computer Science and Engineering at Shanghai Jiao Tong University in July, 2014.
My PhD focuses on networking/mobile measurement, and developing end-to-end systems that leverage data-driven & machine learning techniques to optimize the networking/mobile applications.
News
- Feb. 2020:   Our work on Wearable Microphone Jammers is reported by New York Times!
- Aug. 2019:   Adversarial WiFi sensing paper is accepted by NDSS'20.
- Jun. 2019:   Passed the PhD defense.
- Mar. 2019:   ML for spectrum anomaly detection paper is accepted by MobiHoc'19.
Publications
- Wearable Microphone Jamming
In Proceedings of ACM CHI Conference on Human Factors in Computing Systems (CHI), Honolulu, HI, Apr 2020 - Et Tu Alexa? When Commodity WiFi Devices Turn into Adversarial
Motion Sensors
In Proceedings of the 27th Network & Distributed System Security Symposium (NDSS), San Diego, CA, Feb 2020. - Scaling Deep Learning Models for Spectrum Anomaly Detection
In Proceedings of the 20th ACM International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc), Catania, Italy, Jul 2019. - Predictive Analysis in Network Function Virtualization
In Proceedings of 18th ACM SIGCOMM Internet Measurement Conference (IMC), Boston, USA, Nov 2018. - Adversarial Localization against Wireless Cameras
In Proceedings of the 19th International Workshop on Mobile Computing Systems and Applications (HotMobile), Tempe, USA, Feb 2018. - Identifying Value in Crowdsourced Wireless Signal Measurements
In Proceedings of the 26th World Wide Web Conference (WWW), Perth, Australia, Apr 2017. - Accuracy vs. Cost in Commodity Spectrum Monitoring
In Proceedings of the 14th ACM Conference on Embedded Networked Sensor Systems (SenSys), Stanford, USA, Nov 2016. - Differentially Private Spectrum Auction with Approximate Revenue Maximization
In Proceedings of the 15th ACM International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc), Philadelphia, USA, Aug 2014. - Adversarial WiFi Sensing
arXiv preprint arXiv:1810.10109 - Understanding the Effectiveness of Ultrasonic Microphone Jammer
arXiv preprint arXiv:1904.08490
Services
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Technical Program Committee:   INTERNET, 2019, 2020.
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Reviewer:   International Conference on Machine Learning (ICML), 2020.
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Reviewer:   IEEE/ACM Transactions on Networking (ToN), 2019.
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Reviewer:   IEEE Transactions on Vehicular Technology (TVT), 2017.
Press/Media Coverage
New York Times: Activate This 'Bracelet of Silence,' and Alexa Can't Eavesdrop
Chicago Tribune: Activate this bracelet with 24 speakers -- developed by married University of Chicago professors -- and Alexa can't eavesdrop
Seattle TimesActivate This 'Bracelet of Silence,' and Alexa Can't Eavesdrop
The Times UK: Hi-tech bracelet will keep your secrets from Alexa
Yahoo Finance: Ultrasonic bracelet jams the microphones around you
Times of India: This 'bracelet of silence' stops Alexa from spying
National Law Review: Privacy Fashion: Profit from the Surveillance State
Engadget: Ultrasonic bracelet jams the microphones around you
Slashdot: Activate This 'Bracelet of Silence,' and Alexa Can't Eavesdrop
Fast Company: Deafen Amazon and Google with this ingenious bracelet
Yahoo News: Activate This 'Bracelet of Silence,' and Alexa Can't Eavesdrop
Business Insider Spain: Crean una pulsera con ultrasonidos que anula los microfonos e impide que las tecnologicas te espien
CNet France: Ce bracelet brouilleur empeche les enceintes connectees de vous ecouter
Paris Match: Un <
> pour empecher Siri et Alexa de vous ecouter CTV News: Tech with Todd, start at 6:10
RFI Podcast (France): Bracelet of Silence
Independent (Ireland): Listen up: Your life is too boring for Alexa to spy on you
Techtudo (Brazil): Pulseira digital bloqueia microfones proximos e evita espionagem
TJournal (Russia): Bracelet of silence: how a pair of scientists came up with a device for suppressing microphones of "smart" speakers
Baltijas Balss (Latvia): As a couple of scientists came up with a device for suppressing microphones of "smart" speakers, "Anti-clocks" emit ultrasound that interferes with speech recognition
Futurism: THIS CYBERPUNK BRACELET JAMS ANY SPYING MICROPHONES NEARBY
UberGizmo: This Ultrasonic Bracelet Jams Microphones Around You
Mashable: There's a privacy bracelet that jams smart speakers and, hell yeah, bring it
UChicago Magazine: A computer science expert on the data privacy crisis
Termometro (Mexico): Crean pulsera con ultrasonidos que impide que las tecnologicas te espien
Yanko Design: THIS "BRACELET OF SILENCE" ACTIVELY BLOCKS ALEXA AND SIRI FROM HEARING YOUR CONVERSATIONS
TechGenyz: 'Bracelet of Silence': A device to jam smart speakers' ability to spy on conversations
Le Numeriques (France): Ce bracelet empeche les objets connectes et smartphones de vous ecouter
Muy Interesante (Spain): Este 'brazalete del silencio' impide que Alexa te espie
Welt (Germany): Dieses Armband verhindert, dass Alexa und Siri dich belauschen
Sina Tech (China): Scientists Invent "Bracelet of Silence" that can disable surrounding microphones
TechOrange (China): American University Invents "Anti-surveillance" Bracelet, Uses Ultrasonic Signals to Block Smart Speakers and Smartphones
Unwire (Hong Kong): American Researchers Invent Anti-surveillance Bracelet; Uses Ultrasonic Signals to Disrupt Nearby Microphones
Technews (Taiwan): American Researchers Invent Anti-surveillance Bracelet; Uses Ultrasonic Signals to Disrupt Nearby Microphones
SciTechDaily: Silent Surveillance Attack: How Hackers Can Use Wi-Fi to Track You Inside Your Home
Experiences
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Research Intern:   Facebook Inc, 2018.
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Research Intern:   AT&T Lab Research, 2017.