Privacy Preserving Context Transfer in All-IP Networks

  • Giorgos Karopoulos
  • Georgios Kambourakis
  • Stefanos Gritzalis
Part of the Communications in Computer and Information Science book series (CCIS, volume 1)


In an all-IP environment, the concept of context transfer is used to provide seamless secure handovers between different administrative domains. However, the utilization of context transfer arises some privacy issues concerning the location and movement of users roaming between domains. In this paper we elaborate on these privacy issues and propose an alternative context transfer protocol that protects user’ location privacy as well. In addition, assuming that the context carries a user identity in the form of a Network Access Identifier (NAI), we show how the employment of temporary NAIs can further increase the privacy of our scheme.


Privacy context Transfer NAI all-IP networks secure handover 


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  1. 1.
    Xu, P., Liao, J., Wen, X., Zhu, X.: Optimized Integrated Registration Procedure of Mobile IP and SIP with AAA Operations. In: Proceedings of the 20th International Conference on Advanced Information Networking and Applications (AINA), pp. 926–931 (2006).Google Scholar
  2. 2.
    Dutta, A., Fajardo, V., Ohba, Y., Taniuchi, K., Schulzrinne, H.: A Framework of Media-Independent Pre-Authentication (MPA). IETF Internet Draft, draft-ohba-mobopts-mpaframework-03, work in progress (2006).Google Scholar
  3. 3.
    Loughney, J., Nahkjiri, M., Perkins, C., Koodli, R.: Context Transfer Protocol. RFC 4067 (2005).Google Scholar
  4. 4.
    Karopoulos, G., Kambourakis, G., Gritzalis, S.: Survey of Secure Handoff Optimization Schemes for Multimedia Services Over All-IP Wireless Heterogeneous Networks. IEEE Communications Surveys and Tutorials (to appear)Google Scholar
  5. 5.
    Aboba, B., Beadles, M., Arkko, J., Eronen, P.: The Network Access Identifier. RFC 4282 (2005)Google Scholar
  6. 6.
    Palekar, A., Simon, D. Salowey, J., Zhou, H., Zorn, G., Josefsson, S.: Protected EAP Protocol (PEAP) Version 2. IETF Internet Draft, draft-josefsson-pppext-eap-tls-eap-10, expired (2004)Google Scholar
  7. 7.
    Funk, P., Blake-Wilson, S.: EAP Tunneled TLS Authentication Protocol (EAP-TTLS). IETF Internet Draft, draft-ietf-pppext-eap-ttls-01, expired (2002).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Giorgos Karopoulos
  • Georgios Kambourakis
    • 1
  • Stefanos Gritzalis
    • 1
  1. 1.Department of Information and Communication Systems EngineeringUniversity of the AegeanSamosGreece

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