is a group of researchers who study, analyze, build, and evaluate security and privacy aspects of complex networked systems (e.g. social web systems like Twitter, Facebook, and telephone call details). By understanding and characterizing user perceptions of security and privacy, we are interested in building secure usable technologies. Our work derives techniques from Computer Science, Information Technology, Data Mining, Text Mining, Statistics, Social Science, Public Policy, Human Computer Interaction, and Psychology. Below is a tag cloud of the words that we dabble with.

What's New!

May, 2016: We are looking for full time Research Associates and Developers to work with us. Please apply with your CV.

Apr, 2016: Pradyumn successfully defends his Masters Thesis.

Apr, 2016: Paridhi Jain successfully defended her Ph. D. thesis. Slides | Picture.

Apr, 2016: Sonal Goel successfully defended her Masters Thesis. Thesis | Slides | Picture.

Apr, 2016: Precog's second Ph. D. Thesis Defense: Paridhi Jain.

Apr, 2016: Masters Thesis Defense: Sonal Goel.

Apr, 2016: Masters Thesis Defense: Pradyumn Nand.

Apr, 2016: PK will be offering the Privacy and Security in Online Social Media (PSOSM) course on NPTEL. Registrations start in May. Teaser video | Flier.

Apr, 2016: PK will be speaking at TEDx Juhu.

Apr, 2016: Precogs deliver tutorial at OSM Hackathon organized as part of Innerve 2016 at IGDTUW. Picture 1, Picture 2.

Feb, 2016: Our paper "Emotions, Demographics and Sociability in Online Interactions" accepted at ICWSM 2016. Authors: Kristina Lerman, Megha Arora, Luciano Heitor Gallegos Marin, Ponnurangam Kumaraguru and David Garcia.

Feb, 2016: Precog is organizing OSMpalooza: An Online Social Media Hackathon

Dec, 2015: Niharika gives a talk on "Privacy in India: Attitudes and Awareness" at Jaypee Institute of Information Technology (JIIT).

Dec, 2015: Our paper "Online Social Media - New face of policing? A Survey Exploring Perceptions, Behavior, Challenges for Police Field Officers and Residents" gets accepted at 18th International Conference on Human-Computer Interaction. Authors: Niharika, PK.

Dec, 2015: Our paper "On the Dynamics of Username Changing Behavior on Twitter" gets accepted at 3rd IKDD Conference on Data Science, 2016. Authors: Paridhi, PK.

Nov, 2015: Our portal on analysing Facebook pages & Twitter handles of various police organisations in the country.

Nov, 2015: Facebook pages & Twitter handles of various police organisations in the country.

Nov, 2015: IIIT-Delhi is now part of Information Security Education & Awareness Phase II project. The total worth of the project is 96.08 Crore Rupees (approx. 14.7 million USD). IIITD is one among 40 other institutes in the project. PK is the Chief-Investigator for the project at IIIT Delhi. Project duration is for 5 years.

Oct, 2015: Our workshop on Masters' Trainer program for Staying Safe Online captured in IIITD's Newsletter.

Oct, 2015: 51 school teachers from Delhi NCR attended our "Master Trainers' Program. Staying Safe Online for School Teachers." Report on CBSE website

Oct, 2015: Niharika's work on Facebook & Twitter handles of police organizations in India gets cited and discussed in Economic Times, page 10, Oct 2. Niharika is also quoted in the article.

Oct, 2015: Five new blog entries! Rohan (Un été français enrichissante (An enriching French summer), Megha (I have been Precog-ed: Part 2), Manik (My experience interning at Precog), Pradyumn (Memoirs from South Asia Workshop 2015 at NUS School of Computing), and Ashwin (It’s been about three years since my time at Precog) pen their experiences at Precog.

Oct, 2015: Anupama receives COSN travel grant.

Sep, 2015: Niharika Sachdeva presented her paper "Online Social Networks and Police in India - Understanding the Perceptions, Behavior, Challenges" at ECSCW 2015.

Sep, 2015: Paridhi presented her paper "Other Times, Other Values: Leveraging Attribute History to Link User Profiles across Online Social Networks" at Hypertext 2015. Picture.

Sep, 2015: PK gave his 8th ACM India Eminent Speaker talk at ITM, Gurgaon.

Sep, 2015: Mr. Vijay Gopal, Assistant Professor, St. Peters Engineering College, Hyderabad, visiting us for a week.

Sep, 2015: PK receives Teaching recognition from IIITD. This recognition is for CSE501 Designing Human Centered Systems that he taught Winter 2015 semester based on the feedback given by students from the course.

Sep, 2015: Pradyumn (our M.Tech. student) gave a talk "Journey of a volunteer to R.E. Merwin Scholarship" at IEEE Delhi Student - Young Professionals - Women In Engineering Congress 2015.

Aug, 2015: Our browser plug-in Facebook Inspector (FbI) crosses 100 downloads on Firefox within 2 weeks of launch. Chrome version launched today. Downloads: Firefox | Chrome

July, 2015: Anupama's paper "What They Do in Shadows: Twitter Underground Follower Market" gets Best Student Paper award at 13th International conference on Privacy, Security, and Trust, Istanbul, Turkey.

July, 2015: PK quoted in National edition of LiveMint! "Stay safe online", July 22.

July, 2015: Niharika's work quoted in The Times of India. "Social media is used to take feedback from people and channelize police resources accordingly, be it for traffic management or crime prevention. A research on how the system made police accountable has already won two Delhi researchers an award in the US." Full research paper.

July, 2015: Megha (starting her Senior year in Fall) presented her internship work on Understanding the Impact of Demographics on Sociability. Work done as part of the Viterbi-India Summer Internship Program at Univ. of Southern California. Her mentors at USC were Prof. Kristina Lerman, and Dr. Luciano Gallegos.

July, 2015: PK gets featured on CMU's home page stories.

July, 2015: Aditi's work gets covered in The Telegraph and BBC News.

July, 2015: Aditi Gupta successfully defended her Ph.D. thesis. Designing and Evaluating Techniques to Mitigate Misinformation Spread on Microblogging Web Services. | Slides | Video

Jun, 2015: Niharika's work on Bengaluru's City Police Facebook page covered on Times of India, Page 2 on June 8, 2015. "Study on City Police's Social Media Use Bags US Varsity Award". Picture.

Jun, 2015: PK quoted in Live Mint, May 26, 2015, National Edition (Centrespread) "Cyber bullying: Nip it in the bud".

May, 2015: Our paper "Other Times, Other Values: Leveraging Attribute History to Link User Profiles across Online Social Networks" gets accepted at Hypertext 2015. Authors: Paridhi, PK, Prof. Joshi.

May, 2015: Niharika receives Best Paper Award at the 16th Annual International Conference on Digital Government Research.

May, 2015: Our paper "What They Do in Shadows: Twitter Underground Follower Market" gets accepted at the 13th Annual Conference on Privacy, Security and Trust (PST), 2015. Authors: Anupama, PK.

May, 2015: Our paper "Towards Automatic Real Time Identification of Malicious Posts on Facebook" gets accepted at the 13th Annual Conference on Privacy, Security and Trust (PST), 2015. Authors: Prateek, PK.

May, 2015: 260 school teachers and counsellors attended the Strategies for Safe and Effective Use of Online Social Media workshop. Organizers: Niharika, PK. Picture. Album.

Apr, 2015: Our paper "Online Social Networks and Police in India – Understanding the Perceptions, Behavior, Challenges" gets accepted at the European conference on Computer-Supported Cooperative Work (ECSCW). Authors: Niharika, PK.

Mar, 2015: Our paper "Social Networks for Police and Residents in India: Exploring Online Communication for Crime Prevention" gets accepted at the 16th Annual International Conference on Digital Government Research. Authors: Niharika, PK.

Feb, 2015: Srishti Gupta will be presenting her work "Know your targets: Privacy and Security Implications in Instant Messaging Applications" at NYUAD Annual Research Conference, Feb 28 - March 1.

Jan, 2015: 3rd Security & Privacy Symposium, Feb 13 - 14, 2015. Organized at IIITD #spsymp15

Nov, 2014: TweetCred gets "Honorable Mention" at SocInfo 2014. Congrats Aditi! Picture

Sept, 2014: Our paper "bit.ly/malicious: Deep Dive into Short URL based e-Crime Detection." received best paper award at eCRS 2014. Congrats Neha & Anupama! #PrecogRocks

Sept, 2014: PK gave his ACM India Eminent Speaker talk at the ACM Pune's Workshop on Cybersecurity.

Sept, 2014: Aditi's work on TweetCred gets accepted at SocInfo 2014. Acceptance rate: 23%.

Sept, 2014: Paridhi's work on username change gets featured in Economic Times, Page 8, September 04, 2014. Go for Change to Get a Handle on Twitter Popularity.

August, 2014: Our paper "bit.ly/malicious: Deep Dive into Short URL based e-Crime Detection" gets accepted at APWG eCrime Research Symposium (eCRS), 2014. Authors: Neha, Anupama, PK.

August, 2014: Our paper "Emerging Phishing Trends and Effectiveness of the Anti-Phishing Landing Page" gets accepted at APWG eCrime Research Symposium (eCRS), 2014. Authors: Srishti, PK.

August, 2014: PK's article on Privacy and Security in Online Social Media published on Defence and Security Alert (DSA) magazine.

July, 2014: Our paper "Analyzing Social and Stylometric Features to Identify Spear phishing Emails" gets accepted at APWG eCrime Research Symposium (eCRS), 2014. Authors: Prateek, Anand Kashyap, and PK.

July, 2014: PK quoted in Times of India, July 26, 2014 Mumbai Edition on Page 9 "Crooks make money out of breaking news" ToI has 3.1+ Million readership. Physical paper version. Article also quotes Anupama and Ashwin's paper on PhishAri.

July, 2014: PK quoted in Economic Times today, July 15, 2014 on Page 2. "Not Enough Tweets, Ministers on Twitter." ET has 800,000+ readership. Physical paper version. Online version.

July, 2014: Wombat Security Technologies received $6.7 Million. PK's Ph.D. thesis work contributed in creating Wombat.

Jun, 2014: New technical report: "bit.ly/malicious: Deep Dive into Short URL based e-Crime Detection". Authors: Neha, Anupama, PK.

Jun, 2014: New technical report: "Analyzing Social and Stylometric Features to Identify Spear phishing Emails". Authors: Prateek, Dr. Anand Kashyap, PK.

Jun, 2014: New technical report: "Emerging Phishing Trends and Effectiveness of the Anti-Phishing Landing Page". Authors: Srishti, PK.

Jun, 2014: Sudip & Abhishek successfully defend their Masters Thesis! Slides (Sudip). Slides (Abhishek). Thesis (Abhishek).

Jun, 2014: Vasudevan Mukunth blogs about Prateek's work on Facebook, and Aditi's work on Twitter.

Jun, 2014: Innovate Dehli: Day 0, Day 1, Day 2, Day 3, Day 4, Day 6, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Pitch Day.

May, 2014: New technical report: "@I to @Me: An anatomy of username changing behavior on Twitter". Authors: Paridhi, and PK.

May, 2014: New technical report: "TweetCred: A Real-time Web-based System for Assessing Credibility of Content on Twitter". Authors: Aditi, PK, Carlos, and Patrick.

May, 2014: New technical report: Indian Premier League (IPL), Cricket, Online Social Media. Authors: Megha, Raghav, and PK.

May, 2014: New technical report: "It Doesn’t Break Just on Twitter. Characterizing Facebook content During Real World Events". Authors: Prateek and PK.

May, 2014: New technical report: "Online Social Media and Police in India: Behavior, Perceptions, Challenges". Authors: Niharika and PK.

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