1. Generalized key delegation for hierarchical identity-based encryption;Abdalla,2007
2. A. Beimel, Secure Schemes for Secret Sharing and Key Distribution, PhD Thesis, Israel Institute of Technology, Technion, Haifa, Israel, 1996.
3. Ciphertext-policy attribute-based encryption;Bethencourt,2007
4. Hierarchical identity based encryption with constant size ciphertext;Boneh,2005
5. Identity-based encryption from the Weil pairing;Boneh,2001