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Wireless Sensor Networks (WSNs) are exposed to numerous security threats that can affect the execution of applications. Securing WSNs is challenging due to their unique nature as an application and a network, and due to their limited capabilities. Therefore, the authors introduce SM-Sens, a secure middleware that helps bridge the gap between high-level application requirements and WSN managing complexity. Their middleware uses defense mechanisms like asymmetric cryptography and authentication. The middleware defenses are efficient against a number of attacks either preventing from them or minimizing the damage they may cause to the network. They evaluate their middleware through extensive analysis, implementation, simulations and measurements.
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