Attack detection vs p rivacy in wireless sensor networks
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Attack detection vs. p rivacy in wireless sensor networks. Wireless sensor network (WSN) Constrained in energy & computational power Usually process sensitive information Often deployed in physically unprotected area High risk of being attacked Active attacker disturbs network operation

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Attack detection vs. p rivacy in wireless sensor networks

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Attack detection vs p rivacy in wireless sensor networks

IHCONFERENCE 2011

Attack detection vs. privacy in wireless sensor networks

  • Wireless sensor network (WSN)

    • Constrained in energy & computational power

    • Usually process sensitive information

    • Often deployed in physically unprotected area

  • High risk of being attacked

    • Active attacker disturbs network operation

    • Passive attacker deduces sensitive information

  • How to protect WSN against both types of attacks?

    • Privacy mechanism

    • Intrusion detection system (IDS)


Somewhat contradictory aims

IHCONFERENCE 2011

Somewhat contradictory aims

  • Privacy mechanism hides the links between various events

    • Packets are re-encrypted hop-by-hop

    • Identities in packets are replaced with per-packet changing pseudonyms

    • Dummy traffic is added

  • IDS detects attack by linking events together

  • Problems

    • IDS cannot deduce that packets were sent by X & addressed to Y

    • Cannot determine that X sends too many packets

    • Cannot decide whether packets were forwarded by Y or not

A

X

Y


Research questions

IHCONFERENCE 2011

Research questions

  • What problems do occur when both techniques are used?

  • How to employ both techniques together?

  • Jiří Kůr, Vashek Matyáš, Andriy Stetsko, Petr Švenda. Attack detection vs. privacy – How to find the link or how to hide it?To appear in the proceedings of the 19th Security Protocols Workshop, Cambridge, 2011. LNCS.Springer Verlag, 2011.

  • Pre-proceedings version available at:

    • http://spw.stca.herts.ac.uk/papers.shtml

    • [email protected]


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