Chen Yang Furong Wang Xinmei Wang Efficient Mediated Certificates Public-Key Encryption Scheme without Pairings. 109-112 2007 conf/aina/2007w1 AINA Workshops (1) http://doi.ieeecomputersociety.org/10.1109/AINAW.2007.168 db/conf/aina/ainaw2007-1.html#YangWW07