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In this paper, a secure efficient hierarchical key management scheme (SEHKM) for wireless sensor networks is proposed. It satisfies several requirements of WSN. The design of the scheme is motivated by the constraints of sensor networks and high resources cost in traditional key management techniques. The key management scheme supports the establishment of three types of keys to encrypt messages sent...
Over the last decade, efforts from industries and research communities have been made in addressing the security of Supervisory Control and Data Acquisition (SCADA) systems. However, the SCADA security deployed for critical infrastructures is still a challenging issue today. This paper gives an overview of the complexity of SCADA security. Products and applications in control network security are...
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