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!

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.

Apr, 2014: TweetCred, our real-time system to assess credibility of content on Twitter goes live! Covered in media, Daily Dot, Washington Post, Doha News, KNTV, New Yorker. Please use and participate.

Apr, 2014: A successful Building Better Interfaces 2014!

Apr, 2014: Neha Gupta successfully defended Masters Thesis today.

Apr, 2014: PK's new blog entry "Mi primera experiencia: IIITD part of the First meeting of the Joint Committee on Science and Technology Peru-India".

Apr, 2014: Neha Gupta's M.Tech. Thesis Defense. Exploration of gaps in Bitly's spam detection and relevant countermeasures. 1100 - 1230hrs IST. April 24, 2014.

Apr, 2014: PK's new blog entry, Student start-up culture brewing at IIITD! Elated to be involved in some.

Mar, 2014: Ari Klein from CrowdFlower blogs about Aditi's work, "When Should You Trust a Tweet?"

Mar, 2014: As part of the ACM Eminent Speakers program, PK gave a talk on Privacy and Security in Online Social media at Thapar University.

Mar, 2014: Sudip presented the paper "Pinned it! A large scale study of the Pinterest network" at ACM CoDS 2014. Image | Image

Feb, 2014: Our paper "A Three-Way Investigation of a Game-CAPTCHA: Automated Attacks, Relay Attacks and Usability" gets accepted at ACM Symposium on Information, Computer and Communications Security (ASIACCS), 2014. Acceptance rate: 20%. Authors: Mohamed, M., Niharika, Georgescu, M., Gao, S., Saxena, N., Zhang, C., PK, Van Oorschot, P., and Chen, W.

Jan, 2014: Our research work on 'Analyzing fake images on Twitter during Hurricane Sandy' gets covered in the Wired Magazine.

Jan, 2014: Cybersecurity Education and Research Centre (CERC) inauguration pictures.

Jan, 2014: Anupama and Prateek receive NIXI Fellowship 2014.

Dec, 2013: Our paper "Pinned it! A large scale study of the Pinterest network" accepted at ACM CoDS (IKDD Conference on Data Science). Acceptance rate: 15%. Authors: Sudip, Neha, Prateek, and PK.

Dec, 2013: SocialCaller App made public now. Please use & help spread the word!

Dec, 2013: New blog entries: I have been Precog-ed! by Megha. Aim in life is to find the “meaning and change the world” by PK.

Dec, 2013: Neha Gupta & Anupama Aggarwal write a blog entry bitly could do better!

Nov, 2013: Prateek Dewan will be interning at Symantec Research Labs India starting 2 Dec 2013. Congrats Prateek!

Nov, 2013: Students, TAs, evaluators, and PK from the course, Privacy and Security in Online Social Media, #cse648. #PSOSMStudentsRock.

Nov, 2013: Srishti successfully defended her Masters Thesis "OCEAN: Open-source Collation of eGovernment data And Networks - Understanding Privacy Leaks in Open Government Data". Picture from the defense.

Nov, 2013: Our paper "On the Viability of CAPTCHAs for Use in Telephony Systems: A Usability Field Study" accepted & presented at 16th Information Security Conference 2013. Acceptance rate: 23%. Authors: Niharika, Prof. Nitesh Saxena (UAB), and PK. Slides.

Nov, 2013: Anupama's #DelhiElections work covered on Economic Times, Page 4 on Nov 15. "Twitter Politicians Who Don't Tweet".

Nov, 2013: Prachi successfully defended her Masters Thesis "Call Me MayBe: Understanding Nature and Risks of Sharing Mobile Numbers on Online Social Networks". Picture.

Nov, 2013: Our work on Safe Safari appeared on Associated Press on Nov 11th "India: Apps and GPS Trackers Help Women Stay Safe in New Delhi", and related interview. Team: Paridhi, Megha, and Neha.

Nov, 2013: Our work on #DelhiElections covered on Page 3 of Economic Times today, Nov 11, 2013. Graphic. Link to online article.

Nov, 2013: Many Precogs were recognized for their achievements / contributions during the 5th year celebration of IIITD: Aditi, Paridhi, Niharika, Anupama, Neha, Megha, Kanika (Aumni), Hemank (Alumni), PK.

Nov, 2013: Story of Patna Blasts, Bihar, 2013. 39747 tweets, 14820 Facebook posts, 1126 Flickr images, 614 G+ posts, 173 YouTube videos.

Oct, 2013: IIITD's 5year celebration video features Precogs (Aditi, Paridhi, Niharika, Anupama, and Prateek), Precog's systems, and the Lab!

Oct, 2013: Our quick hack on Tweets with BBMs that are publicly available. Related blog entry: "Did you tweet your BBM PIN? We know about it".

Oct, 2013: Our #BostonMarathon covered on The Daily Dot, "Almost everything you read on Twitter about the Boston bombing was a lie".

Oct, 2013: Our work on #DelhiElections covered on Front page of DNA today, Oct 24 2013 "Which neta tweets the most? No, it's not Narendra Modi". Link to online article.

Oct, 2013: Patrick from iRevolution (has more than 1million hits) writes a blog entry "Analyzing Fake Content on Twitter During Boston Marathon Bombings" on our recent eCRS 2013 paper. Slides.

Oct, 2013: Srishti Gupta writes a blog entry "Moments for life! My first International trip to USA".