David Bernhard, Marc Fischlin, Bogdan Warinschi. On the Hardness of Proving CCA-Security of Signed ElGamal. In Chen-Mou Cheng, Kai-Min Chung, Giuseppe Persiano, Bo-Yin Yang, editors, Public-Key Cryptography - PKC 2016 - 19th IACR International Conference on Practice and Theory in Public-Key Cryptography, Taipei, Taiwan, March 6-9, 2016, Proceedings, Part I. Volume 9614 of Lecture Notes in Computer Science, pages 47-69, Springer, 2016. [doi]