Random key pre-distribution with transitory master key for wireless sensor networks

Authors:
Filippo Gandino;Bartolomeo Montrucchio;Maurizio Rebaudengo
Affiliations:
Politecnico di Torino, Torino, Italy;Politecnico di Torino, Torino, Italy;Politecnico di Torino, Torino, Italy
Venue:
Proceedings of the 5th international student workshop on Emerging networking experiments and technologies
Year:
2009

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Abstract

Many Wireless Sensor Networks (WSNs) employ security schemes based on the symmetric encryption, which requires the establishment and management of cryptographic keys. This paper presents a new key management scheme based on Random Key Pre-Distribution. The novelty of the proposed approach is the introduction of a keyed transformation with a Transitory Master Key, which is exploited by the nodes in order to increase the number of different keys employed in the network. The presence of a larger pool of keys provides more robustness and connectivity than previously proposed Random Key Distribution schemes. Furthermore, random pre-distribution allows recovering secure communication also when the master key has been compromised.