A secure and efficient Ciphertext-Policy Attribute-Based Proxy Re-Encryption for cloud data sharing ?
This paper proposes a new Ciphertext-Policy Attribute-Based Proxy Re-Encryption scheme. The scheme is proved adaptively chosen ciphertext secure by leveraging dual system encryption technology and selective proof technique. The paper also proposes an improvement for re-encryption key generation and re-encryption phases so as to reduce computational and communication cost.
ciphertext-policy attribute-based proxy re-encryption ciphertext-policy attribute-based encryption adaptive chosen-ciphertext security