AccA: A Decentralized and Accumulator-Based Authentication and Authorization Architecture for Autonomous IoT in Connected Infrastructures

In the realm of Intelligent Transport Systems and connected infrastructures, the use of IoT devices offers improved safety and efficient traffic management. However, the emergence of trends such as Social IoT, particularly in ad-hoc networking, poses a significant challenge for cybersecurity and trust between nodes. To address this, we propose an efficient trust model architecture designed specifically for dynamic, ad-hoc environments where IoT interactions are frequent. Our model focuses on decentralized authorization, where trust is established on the object level, rather than relying on centralization. Our proposed architecture is backed by security proofs and a proof-of-concept implementation using nested cryptographic accumulators, which shows the effectiveness and feasibility of the proposed trust mechanism.