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Institute of Computer Science
Georg-August-Universität Göttingen
                                                                                               
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Dipl.-Ing. Hannes Tschofenig

Position:   PhD Student
Phone:   +358 50 4871445
Fax:   +49 551 39-14416
Office:  
Email:   Hannes.Tschofenig a nsn.com

Address:
Georg-August-Universität Göttingen
Institut für Informatik
Computer Networks Group
Goldschmidtstr. 7
37077 Göttingen

Homepage


Hannes Tschofenig is a Senior Research Scientist at Nokia Siemens Networks and guest lecturer at the University of Goettingen. He currently serves as member of the Internet Architecture Board (IAB) and co-chair of IETF OAUTH and KEYPROV working groups, former co-chair of IETF DIME and ECRIT working groups, and a co-author of more than 40 RFCs, including:
  • rfc3726, Requirements for Signaling Protocols
  • rfc4081, Security Threats for Next Steps in Signaling (NSIS)
  • rfc4230, RSVP Security Properties
  • rfc4279, Pre-Shared Key Ciphersuites for Transport Layer Security (TLS)
  • rfc4442, Bootstrapping Timed Efficient Stream Loss-Tolerant Authentication (TESLA)
  • rfc4484, Trait-based Authorization Requirements for the Session Initiation Protocol (SIP)
  • rfc4487, Mobile IPv6 and Firewalls: Problem Statement
  • rfc4507, Transport Layer Security (TLS) Session Resumption without Server-Side State
  • rfc4589, Location Type Registry
  • rfc4621, Design of the IKEv2 Mobility and Multihoming (MOBIKE) Protocol
  • rfc4745, Common Policy: A Document Format for Expressing Privacy Preferences
  • rfc4764, The EAP-PSK Protocol: A Pre-Shared Key Extensible Authentication Protocol (EAP) Method
  • rfc4806, Online Certificate Status Protocol (OCSP) Extensions to IKEv2
  • rfc4891, Using IPsec to Secure IPv6-in-IPv4 Tunnels
  • rfc5069, Security Threats and Requirements for Emergency Call Marking and Mapping
  • rfc5077, Transport Layer Security (TLS) Session Resumption without Server-Side State
  • rfc5106, The Extensible Authentication Protocol-Internet Key Exchange Protocol version 2 (EAP-IKEv2) Method
  • rfc5191, Protocol for Carrying Authentication for Network Access (PANA)
  • rfc5222, LoST: A Location-to-Service Translation Protocol
  • rfc5223, Discovering Location-to-Service Translation (LoST) Servers Using the Dynamic Host Configuration Protocol (DHCP)



  • Research Projects

    Student Projects

    Publications

    Disclaimer: These papers are made available as a means to ensure timely dissemination of scholarly and technical work on a non-commercial basis. Copyright and all rights therein are maintained by the authors or by other copyright holders, notwithstanding that they have offered their works here electronically. It is understood that all persons copying this information will adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.

    2013
    Cloud-based Computation Offloading for Mobile Devices: State of the Art, Challenges and Opportunities, Lei Jiao, Xiaoming Fu, Roy Friedman, Stefano Secci, Zbigniew Smoreda and Hannes Tschofenig, Future Network & Mobile Summit 2013, Lisbon, Portugal, July 2013.
    Read abstract jiao_article13.pdf [221.4 kB]

    2011
    NSIS Protocol Operation in Mobile Environments, Takako Sanda, Xiaoming Fu, Seong-Ho Jeong, Jukka Manner, and Hannes Tschofenig, Internet Engineering Task Force, RFC 5980, Next Steps in Signaling (NSIS) Working Group, ISSN: 2070-1721, March 2011.
    Read abstract PDF [68.0 kB]

    2010
    NAT/Firewall NSIS Signaling Layer Protocol (NSLP), Martin Stiemerling, Hannes Tschofenig, Cedric Aoun, and Elwyn Davies, Internet Engineering Task Force, RFC 5973, Next Steps in Signaling (NSIS) Working Group, October 2010.
    Read abstract PDF [135.9 kB]

    General Internet Signaling Transport (GIST) State Machine, Tseno Tsenov, Hannes Tschofenig, Xiaoming Fu, Cedric Aoun, and Elwyn Davies, Internet Engineering Task Force, Request for Comment (RFC) 5972, Next Steps in Signaling (NSIS) Working Group, October 2010.
    Read abstract PDF [34.5 kB]

    How secure is the next generation of IP-based emergency services architecture?, Hannes Tschofenig, Mayutan Arumaithurai, Henning Schulzrinne, Bernard Aboba, International Journal of Critical Infrastructure Protection, Volume 3, Issue 1, pages 41-50, Elsevier, doi:10.1016/j.ijcip.2010.02.001, May 2010.
    Read abstract PDF [595.0 kB]

    Traffic Classification and Quality of Service (QoS) Attributes for Diameter, Jouni Korhonen, Hannes Tschofenig, Mayutan Arumaithurai, Mark Jones, and Avi Lior, Request For Comment (RFC) 5777 (Proposed Standard), Internet Engineering Task Force, ISSN 2070-1721, February 2010.
    Read abstract PDF [55.8 kB]

    2009
    Overhead and Performance Study of the General Internet Signaling Transport (GIST) Protocol, Xiaoming Fu, Henning Schulzrinne, Hannes Tschofenig, Christian Dickmann, and Dieter Hogrefe, ACM/IEEE Transactions on Networking, 17(1): 158-171, February 2009.
    Read abstract PDF [210.7 kB]

    2008
    Performance Study of the NSIS QoS-NSLP Protocol, Mayutan Arumaithurai, Xiaoming Fu, Bernd Schloer, and Hannes Tschofenig, The 51th Annual IEEE Global Telecommunications Conference (GLOBECOM 2008), Next Generation Networks, Protocols, and Services Symposium, New Orleans, LA, USA, IEEE, December 2008.
    Read abstract PDF [328.7 kB]

    Spam Score for SIP, D. Wing, S. Niccolini, Martin Stiemerling, and Hannes Tschofenig, Internet draft (work in progress), IETF, February 2008.
    Read abstract TXT [14.5 kB]

    2007
    An NSIS-based Approach for Firewall Traversal in Mobile IPv6 Networks, Niklas Steinleitner, Xiaoming Fu, Dieter Hogrefe, Thomas Schreck, and Hannes Tschofenig, Third Annual International Wireless Internet Conference (WICON 2007), Austin, Texas, USA, ACM Press, October 2007.
    Read abstract PDF [372.2 kB]

    2006
    Beyond QoS Signaling: a Generic IP Signaling Framework, Xiaoming Fu, Hannes Tschofenig, and Dieter Hogrefe, Computer Networks, Volume 50, Issue 17, pages 3416-3433, Elsevier, December 2006.
    Read abstract PDF [602.3 kB]

    Securing the Next Steps in Signalling (NSIS) Protocol Suite, Hannes Tschofenig, and Xiaoming Fu, International Journal of Internet Protocol Technology, Volume 1, No. 4, pages 271-282, InderScience Publishers, ISSN 1743-8209, August 2006.
    Read abstract PDF [431.5 kB]

    Implementation and Performance Study of a New NAT/Firewall Signaling Protocol, Niklas Steinleitner, Henning Peters, Xiaoming Fu, and Hannes Tschofenig, in Proceedings of the 26th International Conference on Distributed Computing Systems-Workshops (ICDCSW 2006), the 5th International Workshop on Assurance in Distributed Systems and Networks (ADSN2006), Lisboa, Portugal, IEEE Computer Society, ISBN 0-7695-2541-5, July 2006.
    Read abstract PDF [394.6 kB]

    Overhead and Performance Study of the General Internet Signaling Transport (GIST) Protocol, Xiaoming Fu, Henning Schulzrinne, Hannes Tschofenig, Christian Dickmann, and Dieter Hogrefe, IEEE INFOCOM 2006, Bacelona, Spain, IEEE, April 2006.
    Read abstract PDF [181.9 kB]

    Comparison Studies between Pre-Shared and Public Key Exchange Mechanisms for Transport Layer Security, Fang-Chun Kuo, Hannes Tschofenig, Fabian Meyer, and Xiaoming Fu, Proceedings of the 9th IEEE Global Internet Symposium, in conjunction with IEEE INFOCOM 2006, Barcelona, Spain, pages 77-82, IEEE, ISBN 3-937201-01-7, April 2006.
    Read abstract PDF [331.4 kB]

    Comparison Studies between Pre-Shared Key and Public Key Exchange Mechanisms for Transport Layer Security (TLS), Fang-Chun Kuo, Hannes Tschofenig, Fabian Meyer, and Xiaoming Fu, Technical Report No. IFI-TB-2006-01, Institute of Computer Science, University of Göttingen, Göttingen, Germany, ISSN 1611-1044, 2006.
    Read abstract PDF [357.6 kB]

    2005
    A Quality-of-Service Resource Allocation Client for CASP, Henning Schulzrinne, Hannes Tschofenig, Xiaoming Fu, and Jochen Eisl, Technical Report No. TB-IFI-2005-07, Institute of Computer Science, University of Goettingen, Germany, ISSN 1611-1044, November 2005.
    Read abstract PDF [99.8 kB]

    Security Implications of the Session Identifier, Hannes Tschofenig, Henning Schulzrinne, Robert Hancock, Andrew McDonald, and Xiaoming Fu, Technical Report No. TB-IFI-2005-08, Institute of Computer Science, University of Goettingen, Germany, ISSN 1611-1044, November 2005.
    Read abstract PDF [79.7 kB]

    NSIS: A New Extensible IP Signaling Protocol Suite, Xiaoming Fu, Henning Schulzrinne, Attila Bader, Dieter Hogrefe, Cornelia Kappler, Georgios Karagiannis, Hannes Tschofenig, and Sven Van den Bosch, IEEE Communications Magazine, Internet Technology Series, 43(10): 133-141, IEEE, October 2005.
    Read abstract PDF [159.9 kB]

    Towards Self-optimizing Protocol Stack for Autonomic Communication: Initial Experience, Xiaoyuan Gu, Xiaoming Fu, Hannes Tschofenig, and Lars Wolf, In: Ioannis Stavrakakis and Michael Smirnov (eds), Proceedings of 2nd IFIP International Workshop on Autonomic Communication (WAC 2005), Athens, Greece, Lecture Notes in Computer Science, Volume 3854, pages 186-201, Springer-Verlag, October 2005.
    Read abstract PDF [296.8 kB]

    Advanced Authentication and Authorization for Quality of Service Signaling, Tseno Tsenov, Hannes Tschofenig, Xiaoming Fu, and Eckhart Koerner, 1st IEEE Workshop on Security and QoS in Communication Networks (SecQoS 2005), Athens, Greece (in conjunction with the first IEEE International Conference on Security and Privacy for Emerging Areas in Communication and Networks - SECURECOM 2005), Pages 224-235, IEEE Computer Society Press, September 2005.
    Read abstract PDF [959.2 kB]

    Enabling Mobile IPv6 in Operational Environments, Xiaoming Fu, Hannes Tschofenig, Srinath Thiruvengadam, and Wenbing Yao, in: Pascal Lorenz (ed), Proceedings of the 10th IFIP International Conference on Personal Wireless Communications (PWC 2005), Colmar, France, pp. 365-372, Imperial College Press, ISBN 1-86094-582-1, August 2005.
    Read abstract PDF [162.4 kB]

    2003
    Mobility Support for Next-Generation Internet Signaling Protocols, Xiaoming Fu, Henning Schulzrinne, and Hannes Tschofenig, Proceedings of the IEEE 58th Vehicular Technology Conference (VTC 2003-Fall), Orlando, Florida, USA, pp. 1979-1983, Symposium on IP Mobility, IEEE, ISBN 0-7803-7954-3, October 2003.
    Read abstract PDF [75.9 kB]

    CASP - Cross-Application Signaling Protocol, Henning Schulzrinne, Hannes Tschofenig, Xiaoming Fu, and Andrew McDonald, Technische Berichte des Instituts für Informatik an der Georg-August-Universität Göttingen, Institut für Informatik, Georg-August-Universität Göttingen, Germany, ISSN 1611-1044, IFI-TB-2003-01, (equivalent to the Internet draft), March 2003.
    Read abstract PDF [103.1 kB]

    2002
    Analysis on RSVP Regarding Multicast, Xiaoming Fu, Cornelia Kappler, and Hannes Tschofenig, Technische Berichte des Instituts für Informatik an der Georg-August-Universität Göttingen, Institut für Informatik, Georg-August-Universität Göttingen, Germany, ISSN 1611-1044, IFI-TB-2002-001, October 2002.
    Read abstract PDF [335.7 kB]



     
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