Fucai Zhou Xiumei Liu Hong Yan Guiran Chang Cryptanalysis and Improvement of EC2C-PAKA Protocol in Cross-Realm. 82-87 2008 NPC Workshops http://doi.ieeecomputersociety.org/10.1109/NPC.2008.75 conf/npc/2008w db/conf/npc/npc2008w.html#ZhouLYC08