Nowadays, life seems to be deficient without Internet. The Internet of Things (IoT) is heavily affecting our daily lives in many domains, ranging from tiny wearable devices to large industrial systems. In face of this rapid improvements, security threats and privacy issues also have brought critical challenges in designing and implementing such applications. In this work, we aim to find a way to protect the data from the WSNs devices to the cloud server or control unit. Also, the task of data management in WSNs is a vital issue that can be performed with limited resources such as processing, memory and energy. So, we have proposed a light implementation for AES 128 key in order to be used to encrypt the data sent by these sensors. We have adopted three different platforms which are Sky and Z1 motes to test this algorithm. Applying such algorithm leads to consume more power but guarantees a secure communication against malicious nodes.
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