89 / 2015-12-29 01:31:35

Efficient Functional Encryption and Proxy re-cryptography for Secure Public Cloud Data Sharing

DFA-based FPRE ,outsourcing decryption ,cloud computing

With the rapid development in cloud computing, public cloud data sharing concept has been extending and expanding by many scholars. In 2014, Liang et al. proposed a general notion for proxy re-encryption (PRE), which is called deterministic finite automata-based functional PRE (DFA-based FPRE). Motivated by the issues of efficiency and flexibility associated with this new primitive, we propose outsourcing decryption scheme to increase the flexibility of users by delegating their decryption rights to the semi trusted proxy. Through analysis we showed that our scheme is provably secure and efficient.