Research Interests

I am primarily interested in all aspects of security in distributed systems. I have been working on applying cryptographic techniques in building secure protocols to solve various problems in distributed systems.

Recent talks

Intuitive and Sensible Access Control [slides (updated: Jan 2010)]
On-board Credentials with Open Provisioning [slides (updated: Jan 2010)]
Initializing Security Associations for Personal Devices
Phishing and Mobile Phones

List of publications

Disclaimer

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External Authenticated Non-Volatile Memory with Lifecycle Management for State Protection in Trusted Computing (with Jan-Erik Ekberg)
  • (to appear) Proceedings of the First International Conference on Trusted Systems, Beijing, Dec 2009.
Controlling Resource Hogs in Delay-Tolerant Networks (with John Solis, Kari Kostiainen, Philip Ginzboorg and Jörg Ott)
On-board Credentials with Open Provisioning (with Kari Kostiainen, Jan-Erik Ekberg, and Aarne Rantala)
Standards for security associations in personal networks: a comparative analysis (with Jani Suomalainen and Jukka Valkonen)
  • Interational Journal of Security in Networks 4(1/2): 87-100, 2009 (DOI bookmark)
    • Scheduling the execution of credentials in constrained secure environments (with Jan-Erik Ekberg, Kari Kostiainen and Aarne Rantala)
    Using Salience Differentials to Making Visual Cues Noticeable (with Andreas Heiner)
    Secure Roaming with Identity Metasystems (with Long Nguyen Hoang and Pekka Laitinen)
    A Platform for OnBoard Credentials (with Jan-Erik Ekberg)
    Beyond Secure Channels (with Yacine Gasmi, Ahmad-Reza Sadeghi, Patrick Stewin and Martin Unger)
    Enabling Fairer Digital Rights Management with Trusted Computing (with Ahmad-Reza Sadeghi, Christian Stüble, Marko Wolf and Jan-Erik Ekberg)
    Applicability of identity-based Cryptography in Disruption-tolerant Networking (with Kari Kostiainen, Philip Ginzboorg, Joerg Ott, and Cheng Luo)
    Secure software installation in a mobile environment (with Andreas Heiner)
    Security Associations in Personal Networks: A Comparative Analysis (with Jani Suomalainen and Jukka Valkonen)
    Usability Analysis of Secure Pairing Methods (with Ersin Uzun and Kristiina Karvonen)
    Ad Hoc Security Associations for Groups (with Jukka Valkonen and Kaisa Nyberg)
    • In the Proceedings of the Third European Workshop on Security and Privacy in Ad hoc and Sensor Networks, Hamburg, Germany, September 2006. Volume 4357 of Lecture Notes in Computer Science, Springer. (available in Springerlink.)
    Secure Device Pairing based on a Visual Channel (with Nitesh Saxena, Jan-Erik Ekberg and Kari Kostiainen)
    Efficient Mutual Data Authentication Using Manually Authenticated Strings (with Sven Laur and Kaisa Nyberg)
    Remote storage for mobile devices (with Jarkko Tolvanen, Jaakko Lipasti and Tapio Suihko)
    Visitor management in Personal wireless networks (with Seamus Moloney, Philip Ginzboorg, and Kari Kostiainen)
    Extending Cellular Authentication as a Service (with Pekka Laitinen et al.)
    Issues in Initializing Security
    On the usefulness of proof-of-possession (with Valtteri Niemi and Pekka Laitinen)
    Man-in-the-middle in tunneled authentication protocols (with Kaisa Nyberg and Valtteri Niemi)
    Defining authorization domains using virtual devices (with Sampo Sovio and Kaisa Nyberg)
    • In the Proceedings of the 2003 Symposium on Applications and the Internet Workshops (SAINT'03 Workshops), 2003. Available at IEEExplore
    Securing ad hoc routing protocols (with Manel Guerrero Zapata)
    Secure Vickrey Auctions without Threshold Trust. (with Helger Lipmaa and Valtteri Niemi).
    • In Financial Cryptography 2002, Lecture Notes in Computer Science, Volume 2357, pages 87-101, 2002. Springer-Verlag.
    Authentication and key generation for mobile IP using GSM authentication and roaming (with Henry Haverinen and Tuomas Määttänen)
    • In Proceedings of the 2001 IEEE International Conference on Communications (ICC 2001), Helsinki, Finland. Pages 2453-2457, vol. 8. Available at IEEExplore
    SEMPER - Secure Electronic Marketplace for Europe (edited by Gerard Lacoste et al), Springer, Lecture Notes in Computer Science 1854, 2000
    • Architecture -- Chapter 6 (with Birgit Baum-Waidner et al)
    • The Payment Framework -- Chapter 11 (with Michael Steiner)
    Key Agreement in Ad-hoc Networks (with Philip Ginzboorg)
    Authenticating Public Terminals (with Michael Steiner, Hervé Debar, and Michael Waidner)
    Towards a Framework for Handling Disputes in Payment Systems (with Michael Steiner and Els van Herreweghen)
    Protecting the Computation Results of Free-roaming Agents (with Ceki Gülcü and Günter Karjoth)
    • Proceedings of the Second International Workshop on Mobile Agents (MA '98), LNCS 1477, pp. 195-207, Sep. 1998.
    • Personal Technologies, 2(2):92-99, Dec. 1998. (abstract)
    Fairness in Electronic Commerce
    More on Optimistic Fair Exchange (with Victor Shoup and Michael Waidner)
    Design of a Generic Payment Service (with Jose Abad-Peiro, Michael Steiner, and Michael Waidner)
    Electronic Payment Systems (with Phil Janson, Michael Steiner, and Michael Waidner)
    • IBM Research Report RZ 2890, Dec. 1996.
    • An edited version appeared in the IEEE Computer Magazine, Sep. 1997, 30(9):28-35.
    • A Japanese translation appeared in Nikkei Computer, pp. 195-201, issue of March 30, 1998.
    • An updated version appeared as a chapter in volume 53 of the series Advances in Computers published in 2000. (this is the final version submitted for publication.)
    Optimistic Protocols for Fair Exchange (with Matthias Schunter and Michael Waidner)
    • IBM Research Report RZ 2858, Sep. 1996.
    • A shorter version in the Proceedings of the 4th ACM Conference on Computer and Communications Security, Zürich, pp 6-17, Apr. 1997.
    • We have now extended the basic two-party protocol to the multi-party case. It is available as IBM Research Report RZ 2892, Dec. 1996.
    Server-Supported Signatures (with Gene Tsudik and Michael Waidner)
    • Proceedings of the Fourth European Symposium on Research in Computer Security (ESORICS), LNCS 1146, pp. 131-143. Springer-Verlag, Sep. 1996.
    • A slightly extended version appeared in the Journal of Computer Security, 5(1), pp 91-108, 1997.
    Untraceability in Mobile Networks (with Didier Samfat and Refik Molva)
    Security Issues in Mobile Computing
    • CS 690B - Research Proposal, April 1995.
    Anonymity in a Mobile Computing Environment
    • Proceedings of the Workshop on Mobile Computing Systems and Applications, Santa Cruz, Dec. 1994.

    In a previous life...

    Parallel Algorithms for Constructing the Convex Hull in 2-Dimensions.
    • Term Paper for the Computational Geometry course, Summer 1990 (for Prof. Anna Lubiw).
    A Neural Network Simulator for the Connection Machine. (with Ravi Shankar et al)
    A Parallel Free-text Search System with Indexing. (with Ophir Frieder and Sanjay Ranka)
    A Parallel Implementation of the Hough Transform Method. (with Ravi Shankar)
    Last modified: Mon Feb 1 19:19:56 EET 2010
    N. Asokan http://www.acm.org/~asokan

    gif with e-mail address