David Chaum. Showing Credentials without Identification Transfeering Signatures between Unconditionally Unlinkable Pseudonyms. In Jennifer Seberry, Josef Pieprzyk, editors, Advances in Cryptology - AUSCRYPT 90, International Conference on Cryptology, Sydney, Australia, January 8-11, 1990, Proceedings. Volume 453 of Lecture Notes in Computer Science, pages 246-264, Springer, 1990.
Abstract is missing.