Hybrid Cloud Security by Revocable KUNodes-Storage with Identity-Based Encryption

Cloud storage is a service involving cloud providers providing space to customers. services have numerous advantages, including convenience, high computation, and capacity, thereby attracting users outsource data in the cloud. However, directly via stage that are unsafe when outsourcing sensitive for users. Therefore, cipher text-policy attribute-based encryption promising cryptographic solution environment, can be drawn up access control by owners (DO) define policy. Unfortunately, an outsourced architecture applied with introduces challenges, revocation. This issue threat security of DO. Furthermore, highly secure flexible text-based attribute role hierarchy user grouping implemented extending KUNodes (revocation) identity-based encryption. Result evaluated using Cloudsim, our algorithm outperforms terms computational cost consuming 32 MB 150-MB files.