G.Poojitha Devi, D.Daiva Kumari 03 06 The growing digital landscape has intensified the need for robust data security measures to safeguard sensitive information from cyber threats This paper explores the integration of blockchain technology and artificial intelligence AI as a synergistic approach to enhance data security Blockchain known for its decentralized and tamperresistant nature provides a secure foundation for storing and managing data AI with its advanced analytical capabilities adds an intelligent layer to identify and respond to potential threats Blockchains decentralized architecture eliminates a single point of failure reducing the risk of unauthorized access or data manipulation Each block in the chain contains a cryptographic hash of the previous block creating an immutable and transparent ledger This ensures data integrity and establishes a reliable audit trail for all transactions bolstering overall security AI complements blockchain by enabling realtime threat detection and adaptive response mechanisms Machine learning algorithms analyze patterns and anomalies within the data identifying potential security breaches or abnormal activities Through continuous learning AI systems evolve to adapt to new and sophisticated threats enhancing the overall resilience of the security infrastructure The integration of blockchain and AI introduces a novel paradigm for data security Smart contracts selfexecuting contracts with encoded rules on the blockchain automate security protocols and access controls minimizing human error and reducing vulnerabilities Additionally AIdriven predictive analytics can forecast potential security risks allowing proactive measures to be implemented This paper discusses case studies and applications where the combined use of blockchain and AI has proven effective in securing various dataintensive domains such as finance healthcare and supply chain management The collaborative efforts of these technologies create a robust defense against evolving cyber threats ensuring data confidentiality integrity and availability in an increasingly interconnected digital world As organizations strive to fortify their data security measures the integration of blockchain and AI emerges as a powerful solution to address the dynamic challenges of the modern cybersecurity landscape Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026