I am a postdoctoral researcher at Stanford University, working with Prof. Jure Leskovec. I research on data science and machine learning for cybersafety and deception on the web and real world. In my research, I design an end-to-end research methodology to make the web better, safer, and more inclusive by studying malicious behavior, deception, and disinformation (e.g., sockpuppets, fake reviewers, hoaxes, and lying):
(1) I develop novel graph mining and deep learning models that can leverage graph-structured social datasets at a scale of billions of interactions among millions of entities to predict covert and complex malicious users and groups, and
(2) I deploy my methods to make fundamental scientific discoveries that have advanced our scientific understanding of cybersafety and have led to new tools of high impact, being used in production at Flipkart, Reddit, and Wikipedia.

My PhD dissertation (Computer Science, University of Maryland) was awarded the prestigious 2018 ACM SIGKDD Doctoral Dissertation Award runner-up and Larry S. Davis Doctoral Dissertation Award. Prior to that, I was awarded Dr. BC Roy Gold Medal by IIT, Kharagpur.

NEW! I'm in the job market. Feel free to reach me at srijan@cs.stanford.edu. Job Market Material: CV, Research Statement, Teaching Statement, and Diversity Statement.

NEW! Thrilled to recieve the 2018 ACM SIGKDD Doctoral Dissertation Award runner-up!

News

Selected Publications

My complete publication list: Google Scholar

  1. Learning Dynamic Embeddings from Temporal Interaction Networks [PDF] NEW!
    Srijan Kumar, Xikun Zhang, Jure Leskovec
    Under submission (2018)
  2. Video2net: Extracting dynamic interaction networks from multi-person discussion videos [PDF] NEW!
    Chongyang Bai, Srijan Kumar, Jure Leskovec, M. Metzger, J. Nunamaker, V.S. Subrahmanian
    (alphabetical author list)
    Under submission (2018)
  3. Deep graph model for deception detection in dynamic interaction networks NEW!
    Srijan Kumar, Chongyang Bai, Jure Leskovec, V.S. Subrahmanian
    Under preparation (2018)
  4. Representation Learning in Continuous Entity-Set Associations [PDF] NEW!
    Srijan Kumar, Sagar Honnungar, Jure Leskovec
    Under submission (2018)
  5. Community Interaction and Conflict on the Web [PDF] NEW!
    Srijan Kumar, William L. Hamilton, Jure Leskovec, Dan Jurafsky
    WWW (The Web Conference), 2018 – World Wide Web Conference, 2018
    [Project page: Data and Code] [Presentation slides (pptx)] [Presentation slides (pdf)]

    Press: What Reddit Tells Us About Political Coalitions and Conflicts (The Atlantic), Most Reddit battles are started by 1 percent of communities (Engadget), Tiny percent of Reddit communities spark majority of conflicts (CNET), One Percent of Subreddits Are Responsible for Most of the Raids on Reddit (VICE), and more by Inverse, TheNextWeb, theregister.co.uk

  6. False Information on Web and Social Media: A Survey [PDF] NEW!
    Srijan Kumar, Neil Shah
    Social Media Analytics: Advances and Applications, CRC Press, 2018
  7. Rev2: Fraudulent User Prediction in Rating Platforms [PDF] NEW!
    Srijan Kumar, Bryan Hooi, Disha Makhija, Mohit Kumar, Christos Faloutsos, V.S. Subrahmanian
    WSDM, 2018 – Web Search and Data Mining Conference, 2018
    [Project page: Data and Codes] [Presentation slides (pptx)] [Poster]
  8. Measuring the Evolution of a Scientific Field through Citation Frames. [PDF] NEW!
    David Jurgens, Srijan Kumar, Raine Hoover, Dan McFarland, Dan Jurafsky
    TACL, 2018 – Transactions of the Association for Computational Linguistics, 2018
    [Project page with data] [Code]
  9. An Army of Me: Sockpuppets in Online Discussion Communities. [PDF] [Slides]
    Srijan Kumar, Justin Cheng, Jure Leskovec, V.S. Subrahmanian.
    WWW, 2017 – 26th International World Wide Web Conference, 2017

    Best Paper Honorable Mention Award


    Documentary: Familiar Shapes by Heather D. Freeman

    Press: Sock puppet accounts unmasked by the way they write and post (New Scientist), Tool unmasks online puppeteers (New Scientist, print version), Spotting sockpuppets with science (TechCrunch), Sock Puppet Accounts on the Internet Getting You Down? Here’s How to Spot Them (WOWscience)

  10. Predicting Human Behavior: The Next Frontiers.
    V.S. Subrahmanian, Srijan Kumar.
    Science, 2017 – Science, vol. 355, issue 6324, pp. 489, 2017
  11. Edge Weight Prediction in Weighted Signed Networks. [PDF]
    Srijan Kumar, Francesca Spezzano, V.S. Subrahmanian, Christos Faloutsos
    ICDM, 2016 – IEEE International Conference on Data Mining, 2016
    [Project page: Data and Code]
  12. Disinformation on the Web: Impact, Characterisitics and Detection of Wikipedia Hoaxes. [PDF]
    Srijan Kumar, Robert West, Jure Leskovec.
    WWW, 2016 – 25th International World Wide Web Conference, 2016
    [Project page: Data and Code]

    Press: Don't Ask Wikipedia To Cure the Internet (WIRED), Can Wikipedia Solve YouTube's Conspiracy Theory Problem? (Motherboard)

  13. VEWS: A Wikipedia Vandal Early Warning System. [PDF]
    Srijan Kumar, Francesca Spezzano, V. S. Subrahmanian.
    KDD, 2015 – 21th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2015
    [Project page: Data and Code]
  14. Linguisitic Harbingers of Betrayal: A Case Study on an Online Strategic Game. [PDF]
    Vlad Niculae, Srijan Kumar, Jordan Boyd-Graber, Cristian Danescu-Niculescu-Mizil.
    ACL, 2015 – 51st Conference of the Association for Computational Linguistics, 2015
    [Project page: Data and Code]

    Press: Should you worry about people who are too polite? (CNN), When Diplomacy Leads to Betrayal (The Wall Street Journal), Here’s a Good Reason to Be Wary of Overly Polite People (New York Magazine) and more here.

For all publications, please see my Google Scholar.

Tutorials

  1. Data-Driven Approaches towards Malicious Behavior Modeling
    Meng Jiang, Srijan Kumar, V.S. Subrahmanian, Christos Faloutsos
    KDD, 2017 – 23rd ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2017
  2. Antisocial Behavior on the Web: Characterization and Detection
    Srijan Kumar, Justin Cheng, Jure Leskovec
    WWW, 2017 – 26th International World Wide Web Conference, 2017
  3. Identifying Malicious Actors on Social Media
    Srijan Kumar, Francesca Spezzano, V.S. Subrahmanian
    ASONAM, 2016 – Advances in Social Network Analysis and Mining, 2016

Honors and Awards

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