Nowadays ensures that safeguarding sensitive information involves unauthorized person access, stole of day and destroy the stored data in Internet of Things (IOT) systems. In IOT continuous focus on cyber attacks based on limited processing capabilities and improve the internet speed. So reduced the mentioned challenges to process IOT environment with combine of blockchain technology to get the solution. In this research paper make sure that IOT environment working in secure data processing and managing the access of systems. In initial level in iot devices users registered for domain authority and increase privacy of data using public and private key with help of elliptic curve cryptography algorithm. Requests from IoT devices are transmitted through gateways to gateway nodes, where request filtering is performed based on user attribute validation. Subsequently, filtered requests are received by the server, which utilizes the Rock Hyraxes Swarm Optimization (RHSO) method to execute access delegation. Access control decisions are made using the Quorum Byzantine Fault Tolerance algorithm. Finally, mechanisms for client revocation and preservation of client attributes are implemented to enhance security.