Huaqun Wang, Hong Yu. Cryptanalysis of Two Ring Signcryption Schemes. In Moti Yung, Peng Liu, Dongdai Lin, editors, Information Security and Cryptology, 4th International Conference, Inscrypt 2008, Beijing, China, December 14-17, 2008, Revised Selected Papers. Volume 5487 of Lecture Notes in Computer Science, pages 41-46, Springer, 2008. [doi]
Abstract is missing.