This project aims to design a novel integrity-preserving framework to store trust information. Trust assessment frameworks are critical in evaluating the trustworthiness of crowdsourced IoT services, but their accuracy depends on the availability and integrity of trust-related information. This project focuses on improving the access and management of trust-related information, which can be effectively utilized in trust management frameworks. Overall, the proposed framework will enhance the integrity and accuracy of trust assessments in IoT services, ultimately improving the trustworthiness and reliability of IoT systems.