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Delayed Key Exchange for Constrained Smart Devices

  • Joona KannistoEmail author
  • Seppo Heikkinen
  • Kristian Slavov
  • Jarmo Harju
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8629)

Abstract

In the Internet of Things some nodes, especially sensors, can be constrained and sleepy, i.e., they spend extended periods of time in an inaccessible sleep state. Therefore, the services they offer may have to be accessed through gateways. Typically this requires that the gateway is trusted to store and transmit the data. However, if the gateway cannot be trusted, the data needs to be protected end-to-end. One way of achieving end-to-end security is to perform a key exchange, and secure the subsequent messages using the derived shared secrets. However, when the constrained nodes are sleepy this key exchange may have to be done in a delayed fashion. We present a novel way of utilizing the gateway in key exchange, without the possibility of it influencing or compromising the exchanged keys. The paper investigates the applicability of existing protocols for this purpose. Furthermore, due to a possible need for protocol translations, application layer use of the exchanged keys is examined.

Notes

Acknowledgements

The research was conducted in the Internet of Things program of DIGILE (Finnish Strategic Centre for Science, Technology and Innovation in the field of ICT), funded by Tekes.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Joona Kannisto
    • 1
    Email author
  • Seppo Heikkinen
    • 1
  • Kristian Slavov
    • 2
  • Jarmo Harju
    • 1
  1. 1.Tampere University of TechnologyTampere Finland
  2. 2.Ericsson ResearchJorvasFinland

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