Improving data security in cloud computing through fragmentation involves breaking data into smaller pieces and storing them across multiple database. This method enhances security by ensuring that even if one fragment is compromised, the complete data remains inaccessible to attackers. Fragmentation can be combined with encryption, where each fragment is encrypted separately, further strengthening protection. Additionally, dispersing data across different regions or cloud providers minimizes the risk of a single point of failure and unauthorized access. This approach improves confidentiality, integrity, and availability, making cloud storage more secure for sensitive information.