Optimized Secure Data Retrieval System for Encrypted Outsourced Databases

Ensuring data security is a critical requirement for databases outsourced in cloud computing environments. Existing systems often face challenges related to revocation management, data leakage, key management, and user authentication. This study presents a solution that employs an improved row-level encryption method, in which each database row is secured using a distinct encryption key, effectively mitigating security risks. To boost system performance, the approach also incorporates client-side memory utilization and selective encryption. In addition, a revised Diffie-Hellman key exchange protocol is implemented to safeguard communication between the user and the cloud service provider, ensuring protection against interference from malicious actors.