Data Classification and Emerging Encryption Technologies in Big Data and Cloud Computing :  A Systematic Review

This article provides a comprehensive review of recent advancements in data classification methods within the context of big data and cloud computing. As organizations increasingly rely on massive volumes of digital information, robust classification techniques have become essential, particularly for handling sensitive or confidential data. The study explores key approaches, including automated document classification and encryption-based strategies, each addressing distinct challenges related to security and efficiency. Emphasis is placed on how these methods safeguard data confidentiality, integrity, and availability critical factors in mitigating unauthorized access and cyber threats. The review also identifies pressing research gaps, such as the need for more scalable, efficient, and user-friendly classification systems that can adapt to the evolving nature of big data. The objective is to provide an in-depth overview of current practices, highlight persistent challenges, and outline promising directions for future research in this crucial field.