Tatsuaki Okamoto, David Pointcheval. The Gap-Problems: A New Class of Problems for the Security of Cryptographic Schemes. In Kwangjo Kim, editor, Public Key Cryptography, 4th International Workshop on Practice and Theory in Public Key Cryptography, PKC 2001, Cheju Island, Korea, February 13-15, 2001, Proceedings. Volume 1992 of Lecture Notes in Computer Science, pages 104-118, Springer, 2001. [doi]