Hugh C. Williams. Some Public Key Crypto-Functions as Intractable as Factorization. In G. R. Blakley, David Chaum, editors, Advances in Cryptology, Proceedings of CRYPTO 84, Santa Barbara, California, USA, August 19-22, 1984, Proceedings. Volume 196 of Lecture Notes in Computer Science, pages 66-70, Springer, 1984. [doi]
Abstract is missing.