Cloud Computing is an advanced technology for optimizing and innovating business models in organizations. It can be used for providing software and infrastructure services deployed in data centers. Encryption of data and information by data owners and uploading them to the cloud data center leads to different efficiency and secrecy problems. In cloud computing, a user who has authorized credentials should have the ability to access confidential data, such as data owners or cloud providers. In traditional methods of securing data, data are encrypted and stored in a trusted server and their access is controlled by an access control policy. If the cloud server is breached from unauthorized users, the confidentiality of sensitive data will be disclosed. This paper explores an enhanced cloud access control policies over encrypted data using XACML framework and proof of ownership (POW) methodologies. The proposed approach controls the access mechanism over encrypted data by generating a security token for sending responses and receiving user requests for decrypting data based on the previously stored attributes in the XACML policy. The security mechanism will be strengthened by deploying a fingerprint authentication parameter for ensuring confidentiality over untrusted user requests. By applying the cloud access control of XACML framework, the cloud services will perform its agreed functions with preventing data leakage, data loss, and abuse of cloud services. Keywords�XACML, cloud computing, proof of