Through cloud services, the cloud based users and organizations are storing and sharing the data in the advanced cloud computing environment. However, the recent cloud data breaches have raised privacy and secure concerns in the cloud managed data, due to vulnerability in untrusted cloud access control system . However, designing an efficient trusted access control system in cloud through enabling a cryptographically file access control technique is still challenging. In this research contribution, a cloud data security system for an efficient file access control technique that provide practical trusted security for shared cloud data is proposed. Proposed file access control technique revokes Key-Signatures Search Scheme which provides confidential hosted-file data access, by delegating role-based public key-revoking in cloud hosted environment to update encrypted data. In Key-Signatures Search Scheme, the cloud data security is made by encrypting the file by a hosted-file key management, which records hosted-file and its revocation keys simultaneously for key-access enforcement and file-access revocation. In each hosted-file revocations, cloud administrator checks for any in-secure data breach, if found, for that particular hostedfile a new revocation key is updated and request for a new encrypted hosted-file with updated file-access permissions. In Key-Signatures Search Scheme, three stages of key-signatures are monitored and updated based on how hosted-file access if enforced, after enforcing how file is granted for access and finally how revocation of grant hosted-file access is made. By monitoring through these three ways, Key-Signatures Search Scheme, enforces a dynamic hosted-file access control technique at cloud data user side which improves the file access control providing efficiency, which does not require re-submission of revocation keys and repeated file access granting checks, and providing security for a large hosted-files at the cloud data owner side by instant hosted-file key-revoking for access control. Cloud data security framework and system implementation is made in the proposed work to demonstrate the Cloud Data Security and Efficiency of the proposed technique. Proposed Key-Signatures Search Scheme uses formalized shared cloud date framework and cloud owner with user system implementation to establish the cloud data hostedfile security and show efficiency of proposed file access control technique through hosted cloud system design.