BLOCKCHAIN BASED ZTNA SYSTEM

Abstract

The increasing complexity of modern network infrastructures and the rise in sophisticated cyber threats have made traditional perimeter-based security models insufficient for protecting sensitive data and systems. The concept of Zero Trust Network Access (ZTNA) has emerged as a robust security framework that enforces strict identity verification and continuous authentication for every user and device attempting to access network resources. However, centralized ZTNA systems often face challenges such as single points of failure, lack of transparency, and vulnerability to insider attacks. This project proposes a Blockchain-Based ZTNA System that integrates blockchain technology with zero trust principles to enhance security, transparency, and decentralization. The proposed system leverages blockchain technology to create a decentralized and tamperproof access control mechanism. Each access request is verified using cryptographic techniques and recorded as a transaction on the blockchain, ensuring immutability and auditability. Smart contracts are used to enforce access policies dynamically, allowing only authorized users and devices to access specific resources. The system continuously monitors user behavior and validates trust levels before granting access, thereby reducing the risk of unauthorized entry. Additionally, the decentralized nature of blockchain eliminates reliance on a single authority, enhancing system resilience and fault tolerance. The performance of the system is evaluated based on security, scalability, and efficiency. The results demonstrate improved resistance to cyberattacks such as man-in-the-middle attacks, unauthorized access, and data tampering. The system also provides enhanced visibility and traceability of access activities, supporting compliance and auditing requirements. Furthermore, the integration of blockchain with ZTNA enables secure and scalable access control in distributed environments such as cloud computing and IoT networks. Overall, this project highlights the potential of combining blockchain and zero trust principles to develop a next-generation cybersecurity framework that ensures secure, transparent, and reliable network access.