Hash-Based Sequential Aggregate and Forward Secure Signature for Unattended Wireless Sensor Networks

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Executive Summary

Unattended Wireless Sensor Networks (UWSNs) operating in hostile environments face great security and performance challenges due to the lack of continuous real-time communication between senders (sensors) and receivers (e.g., mobile data collectors, static sinks). The lack of real-time communication forces sensors to accumulate the sensed data possibly for long time periods, along with the corresponding signatures for authentication purposes. Moreover, non-real-time characteristic of UWSNs makes sensors vulnerable especially to active adversaries, which compromise sensors and extract all data stored in them. Hence, it is critical to have forward security property such that even if the adversary can compromise the current keying materials, she cannot modify or forge authenticated data generated before the node compromise.

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