Tkbe : Two Key Broadcast Encryption For The Iot

Abstract

The growing usage of the Internet of Things (IoT) has made it necessary to ensure the security of these interconnected devices. Key management becomes particularly challenging when devices are not always online due to resource constraints or business decisions. Moreover, the IoT infrastructure typically relies on the publish-subscribe model for communication, which raises additional security considerations since the message broker becomes a central point of attack. Existing solutions with end-toend encryption from publisher to subscriber are either computationally expensive for resource constrained devices or compromise on the decoupling in publish/subscribe systems. This thesis tackles the problem of efficient key management in IoT systems by employing techniques from broadcast encryption and proposes a lightweight framework - TKBE (Two Key Broadcast Encryption) that reduces trust in the broker and enhances security in IoT communications while providing efficient immediate revocation with decoupling and offline key updates.