Krishna P. Gummadi

Faculty (Tenured)
Head, Networked Systems Research Group
Max Planck Institute for Software Systems (MPI-SWS)

[ Bio | CV | Research | Students / Postdocs | Teaching | Publications | Citations | Media Coverage | Professional Activities | Contact ]

I am broadly interested in understanding and building networked and distributed computer systems.

Past Interests: Internet (Broadband) Access Networks, Trusted Cloud Computing, Peer-to-Peer / Overlay Routing Systems.

Current Interests: Social Computing Systems. (Related Key Words: Crowdsourcing and Social Media Systems, Social and Information Networks, Computational Social Science, Security and Privacy, Information Dissemination and Social Recommender Systems)

Current Research Overview

What are Social Computing Systems? They are an emerging class of societal-scale human-computer systems that facilitate interactions and knowledge exchange between individuals, organizations, and governments in our society. Examples include social networking sites like Facebook and Google+, blogging and microblogging sites like Twitter and LiveJournal, anonymous social media sites like Whisper and 4chan, content sharing sites like YouTube and Instagram, social bookmarking sites like Reddit and Pintrest, crowdsourced opinion sites like Yelp and eBay seller ratings, and social peer production sites like Wikipedia and Amazon's Mechanical Turk.

Motivating Perspectives: From a computer scientist's perspective, social computing systems are human-centric distributed systems, where humans (and their psychological behaviors and social interaction networks) are as much a key component of the distributed system as are the computers (and the data networks and software systems) interconnecting them. From a social scientist's perspective, they are simply computer systems-assisted human interactions. Our studies are motivated by both these perspectives.

Goals: The high-level goals of our studies of social computing systems are to Understand, Predict, and Control the behaviors of their constituent human users and computer systems.

Methodology: We leverage a variety of inter-disciplinary methods in our studies:

Projects: We have conducted some of the earliest studies of Social Network Analysis gathering data from real-world social networks at scale. Our recent studies have focussed on:

Datasets: We have released several datasets from our empirical studies. Details for obtaining them can be found here.

Systems: We have publicly deployed several software systems and apps to illustrate the utility of our studies.

Students / Postdocs

Graduate Students: I work with the following fantastic graduate students at MPI-SWS: Reza Babaei, Juhi Kulshrestha, Mainack Mondal, Bimal Viswanath, Giridhari Venkatadri, Muhammad Bilal Zafar

If you are interested in graduate studies at MPI-SWS, follow this link.

Postdoctoral Researchers: I am delighted to collaborate with Saptarshi Ghosh, Oana Goga, Przemyslaw Grabowicz, Rijurekha Sen, Denzil Correa

Former Students / Postdocs (with their first employment):


  • Security and Privacy in Social Computing Systems: Summer 13
  • Systems Seminar: Winter 10
  • Computer Networks: Summer 07
  • Publications

    For a complete list of my publications in chronological order, follow this link.

    Publications related to past projects: Internet Access Networks | Trusted Cloud Computing | Peer-to-Peer and Overlay Routing Systems

    Publications related to Social Computing Systems grouped by research topic: Trustworthiness, Reputation, and Accountability | Privacy, Anonymity, and Exposure | Information Dissemination, Retrieval, and Assimilation | Fairness, Discrimination, and Transparency | Social Network Analysis

    Trustworthiness, Reputation, and Accountability of Social Identities:

    Privacy, Anonymity, and Exposure in Crowdsourcing Systems:

    Information Dissemination, Retrieval, and Assimilation in Social Media Systems:

    Fairness, Discrimination, and Transparency in Data Driven Decision Systems:

    Social Network Analysis:

    Media Coverage

    Some of our research projects and findings have been covered in the mainstream media and popular blogs.

    Social Computing Systems:

    Internet Access Networks:

    Trusted Cloud Computing:

    Professional Activities

    For a complete list of my activities in chronological order, follow this link.

    Some upcoming and recent journals, conferences, and workshops that I am involved with:

    Contact Information

    Max Planck Institute for Software Systems
    Campus E1 5, Room: 434
    D-66123 Saarbruecken, Germany

    Tel: +49 681 9325-670
    Fax: +49 681 9325-299