@misc{cryptoeprint:2015:374, author = {Christoph Bader and Tibor Jager and Yong Li and Sven Schäge}, title = {On the Impossibility of Tight Cryptographic Reductions}, howpublished = {Cryptology ePrint Archive, Report 2015/374}, year = {2015}, url = {https://eprint.iacr.org/2015/374}, }