User-Centric Approach to Fortify Cloud Data Security with Hybrid Cryptosystem Methods

Cloud storage, provided by various cloud service providers, offers customers convenient storage space along with significant computational power and capacity, attracting users to entrust their data to these services. However, directly outsourcing sensitive data to cloud storage introduces security risks. Cipher text-policy attribute-based encryption emerges as a promising cryptographic solution in the cloud, allowing data owners (DO) to establish access policies for enhanced security.Despite its potential, employing attribute-based encryption in an outsourced architecture introduces challenges, especially concerning revocation, which puts the security of data owners at risk. To overcome these obstacles, a highly secure and flexible cipher text-based attribute access control system is utilized in cloud storage. This system incorporates role hierarchy user grouping, expanding the capabilities of KUNodes' storage identity-based encryption (revocation).Using CloudSim for assessment, our algorithm proves more efficient in terms of computational cost, utilizing 32 MB for 150 MB of data, as indicated by the analysis findings. Combining multiple encryption methods offers several advantages. For instance, establishing a shared channel between two users' devices enables hybrid encryption for communication. While asymmetric encryption might prolong the process, symmetric approaches enhance both encryption forms, speeding up the process. As a result, the transmission mechanism becomes more secure, and the system operates more efficiently.Our current focus in this field revolves around employing hybrid approaches to enhance both the security and speed of encrypting data in cloud computing environments.