Mihir Bellare, Sarah Shoup. Two-Tier Signatures, Strongly Unforgeable Signatures, and Fiat-Shamir Without Random Oracles. In Tatsuaki Okamoto, Xiaoyun Wang, editors, Public Key Cryptography - PKC 2007, 10th International Conference on Practice and Theory in Public-Key Cryptography, Beijing, China, April 16-20, 2007, Proceedings. Volume 4450 of Lecture Notes in Computer Science, pages 201-216, Springer, 2007. [doi]
Abstract is missing.