Due to the rapid growth in networks communication security issue are being a challenging task. In this project deep analysis is to be made in the cyber security using proxy re-encryption and cipher text crypto system. Various algorithm are been proposed for the cipher text encryption and decryption in decentralized mobile networks with mobile user policy. Based on the existing study it is to propose a new algorithm for encryption and decryption. Cipher text-policy attribute-based encryption scheme delegating attribute revocation process to cloud server by proxy re-encryption. The proposed scheme does not require secret sharing schemes (LSSS) access structure. Proposed scheme is secure against attack by unauthorized users and cloud server. Sharing of the cloud storage has a risk of information leakage caused by service. In order the protect data, the data owner encrypts data shared on the cloud storage so that only authorized users can decrypt the cloud data.