Supported by the National Natural Science Foundation of China(No.60970111,60903189,60903020);the National High Technology Research and Development Programme of China(No.2009AA012418);the National Basic Research Program of China(No.2007CB311201);the Foundation of NLMC(No.9140C1103020803)
An accountable authority attribute-based encryption (A-ABE) scheme is presented in this paper. The notion of accountable authority identity-based encryption (A-IBE) was first introduced by Goyal at Crypto'07. It ...
supported by National Basic Research Program of China (Grants Nos. 2007CB311202,2007CB311201);National Natural Science Foundation of China (Grant No. 60970139);National High-Tech Research & Development Plan of China (Grant No. 2006AA01Z427);Strategic Priority Program of Chinese Academy of Sciences (Grant No. XDA06010702)
It is well known that all the known black-box zero-knowledge proofs of knowledge for NP are non- constant-round. Whether there exit constant-round black-box zero-knowledge proofs of knowledge for all NP languages unde...