Project: MUTE

MUTE: Bringing IoT to Noise Cancellation

Authors: Sheng Shen, Nirupam Roy, Junfeng Guan, Haitham Hassanieh, Romit Roy Choudhury

Paper in ACM SIGCOMM 2018

Project: BackDoor

BackDoor: Making Microphones Hear Inaudible Sounds

Authors: Nirupam Roy, Sheng Shen, Haitham Hassanieh, Romit Roy Choudhury

Paper in ACM MobiCom 2017
Slides from the MobiCom 2017 presentation

Paper in NSDI 2018
Slides from the NSDI 2018 presentation

Project: Mole

MoLe: Motion Leaks through Smartwatch Sensors

Authors: He Wang, Ted Tsung-Tei Lai, Romit Roy Choudhury

Paper in ACM MobiCom 2015
Slides from the MobiCom 2015 presentation

Press Release: Daily Mail, Sina News, Yahoo News, The Times of India,, Bangkok Post, Daily Illini, ChicagoInno, Motherboard.VICE, Wareable, PhysOrg, Popular Science, TechRadar, ConsumerAffairs, EurekAlert, Security Affairs,, ...

Project: OverLay

OverLay: Practical Mobile Augmented Reality

Authors: Puneet Jain, Justin Manweiler, Romit Roy Choudhury

Paper in ACM MobiSys 2015
Slides and Video from the MobiSys 2015 presentation

Project: WalkCompass

I am a Smartphone and I can Tell my User’s Walking Direction

Authors: Nirupam Roy, He Wang, Romit Roy Choudhury

Paper in ACM MobiSys 2014
Slides from the MobiSys 2014 presentation

More details on project webpage

NDSS application scenarios

Project: AccelPrint

AccelPrint: Imperfections of Accelerometers Make Smartphones Trackable

Authors: Sanorita Dey, Nirupam Roy (Co-primary authors), Wenyuan Xu, Romit Roy Choudhury, Srihari Nelakuditi

Paper in NDSS 2014
Slides from the NDSS 2014 presentation

Press Release: MIT Technology Review , The Telegraph, UK, Yahoo News, Gizmag, PhysOrg, RedOrbit, TG Daily , The Voice of Russia , Science Daily, Digital Spy, EE Times, Science Newsline Technology , Quartz , BGR News, NewsDuet , Digit , Press-News, NDTV, The Times of India, The Economic Times, ...

InSight application scenarios

Project: InSight

InSight: Recognizing Humans without Face Recognition

Authors: He Wang, Xuan Bao, Romit Roy Choudhury, Srihari Nelakuditi

Paper in ACM HotMobile 2013

Press Release: Los Angeles Times, CNET, San Francisco Chronicle, NewScientist, Sina, Bangkok Post, The Verge, Engadget, Gizmag, Gizmodo, TechCrunch, PhysOrg, Business Insider, PCWorld, InformationWeek, Slate, Mobile Magazine, ZDNet, ...

Project: UnLoc

No Need to War-Drive: Unsupervised Indoor Localization

Authors: He Wang, Souvik Sen, Ahmed Elgohary, M. Farid, Moustafa Youssef, Romit Roy Choudhury

Paper in ACM MobiSys 2012

Press Release: Gizmag, TG Daily, Scientifc American, News Observer, The Verge, PhysOrg, Connected World, Fast Company, I Programmer, Prescouter, Duke Today ...

Project: OPS

Satellites in Our Pockets: An Object Positioning System using Smartphones

Authors: Justin Manweiler, Puneet Jain, Romit Roy Choudhury

Paper in ACM MobiSys 2012

Justin with the SleepWell system

Project: SleepWell

Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation

Authors: Justin Manweiler, Romit Roy

Paper in ACM MobiSys 2011

Nominated for Best Paper Award at MobiSys 2011
Runner-up to Best Demo at MobiSys 2011
Invited for IEEE Transactions on Mobile Computing

Press Release: The Washington Post, The Wall Street Journal, Scientific American, Slashdot, Engadget, TechCrunch, Business Insider, Network World, PhysOrg, ScienceDaily ...

Project: TagSense

TagSense: A Smartphone based Approach to Automatic Image Tagging

Authors: Chuan Qin, Xuan Bao, Romit Roy Choudhury, Srihari Nelakuditi

Paper in ACM MobiSys 2011
Full Video: Part 1, Part 2

Press Release: ACM TechNews, Network World, TG Daily, gizmag, Technorati, The Hindu

Project: Virtual White Board

Virtual White Board TEDx Talk

Authors: Vansh Muttreja, Naveen Santhapuri, Joe Levy, Romit Roy Choudhury

Project: PhonePoint Pen

Using Mobile Phones to Write in Air

Authors: Sandip Agrawal, Ionut Constandache, Shravan Gaonkar, Romit Roy Choudhury

Paper in ACM MobiSys 2011
Paper in ACM Sigcomm Workshop -- MobiHeld 2009
Also won Hoffmann Krippner Award for most innovative input device

Press Release: American Scientific, Slashdot, The Guardian, UK, ABCNews, Yahoo News, ScienceDaily, MSN UK, Live Science ...


Project: SurroundSense

Mobile Phone Localization Via Ambience Fingerprinting

Authors: Martin Azizyan, Ionut Constandache, Romit Roy Choudhury

Paper accepted in ACM MobiCom 2009

Press Release: ACM TechNews, American Scientific, NSF From the Field, Chronicle, Yahoo News, ...