Chris Charnes, Keith M. Martin, Josef Pieprzyk, Reihaneh Safavi-Naini. Secret sharing in hierarchical groups. In Yongfei Han, Tatsuaki Okamoto, Sihan Qing, editors, Information and Communication Security, First International Conference, ICICS 97, Beijing, China, November 11-14, 1997, Proceedings. Volume 1334 of Lecture Notes in Computer Science, pages 81-86, Springer, 1997.
Abstract is missing.