SensorWatermark: a scheme of software watermark using code obfuscation and tamperproofing for WSN

This paper proposes a framework for embedding a software watermark using obfuscation and tamper-proofing techniques, called SensorWatermark in order to inhibit piracy of embedded software in sensor nodes in a WSN. The watermark scheme proposed is characterized as an ordered sequence of obfuscations and guards implemented in the software, where such sequence identifies the software author. SensorWatermark is able to correctly identify the author from the embedded watermark and does not affect negatively the constrained resources of a sensor device. Finally, SensorWatermark is resilient and stealthy to certain attacks, as demonstrated in the experiments.