Security of communications within the Internet of Things context

Résumé

The Internet of Things (IoT) has emerged as a transformative force in recent years, reshaping the digital landscape. IoT encompasses a diverse array of interconnected entities, from tiny sensors to large-scale devices, revolutionizing various aspects of daily life. However, this unprecedented growth also brings forth pressing security and privacy concerns that can potentially overshadow the benefits of IoT. Securing these systems poses multifaceted challenges, particularly for key management in resource-constrained and expansive environments. This doctoral thesis endeavors to address the security and privacy challenges inherent to IoT at various layers. We proposed two robust and efficient security schemes tailored to thwart threats originating from cyber realms. The first contribution results are compelling: The proposed scheme exhibits remarkable efficiency gains when compared to other schemes. It achieves a substantial reduction in storage requirements, saving more than 81.84%. In terms of communications, during the group-wise key establishment, it achieves 100% efficiency. Furthermore, computation overheads are significantly reduced by cutting the number of multiplication operations by 50%, and energy consumption is optimized, with savings of up to 99.99% during the group-wise key establishment phase. Moreover, the results show that our scheme is more resilient against node capture attacks by up to 96.43% during the initialization phase and by more than 98.9% after, making it suitable for use in resource-limited IoT networks. The second contribution results are equally positive: Our solution reduces communication overhead by 93.55%, 91.87%, and 99.75% compared to other solutions during compromising, leaving, and draining cases, respectively. While BAN (Burrows Abadi Needham) logic plays a pivotal role in the first contribution, it doesn’t apply to the second contribution. This validates the efficiency and appropriateness of our solution for IoT networks.

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