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T-CUP: A TPM-based code update protocol enabling attestations for sensor networks

: Wagner, S.; Krauß, C.; Eckert, C.


Rajarajan, M.; Piper, F.; Wang, H.; Kesidis, G.:
Security and Privacy in Communication Networks. 7th International ICST Conference, SecureComm 2011 : London, UK, September 7-9, 2011; revised selected papers
Berlin, Heidelberg: Springer, 2012 (Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 96)
ISBN: 978-3-642-31908-2 (print)
ISBN: 978-3-642-31909-9
ISBN: 3-642-31908-4
International ICST Conference on Security and Privacy in Communication Networks (SecureComm) <7, 2011, London>
Fraunhofer AISEC ()

In this paper, we propose a secure code update protocol for TPM-equipped sensor nodes, which enables these nodes to prove their trustworthiness to other nodes using efficient attestation protocols. As main contribution, the protocol provides mechanisms to maintain the ability of performing efficient attestation protocols after a code update, although these protocols assume a trusted system state which never changes. We also present a proof of concept implementation on IRIS sensor nodes, which we have equipped with Atmel TPMs, and discuss the security of our protocol.