1. Conjunctive broadcast and attribute-based encryption;Attrapadung,2009
2. Secure schemes for secret sharing and key distribution;Beimel,1996
3. Ciphertext-policy attribute-based encryption;Bethencourt,2007
4. Divertible protocols and atomic proxy cryptography;Blaze,1998
5. Identity-based encryption with efficient revocation;Boldyreva,2008