@inproceedings{261d02ab3deb437f85d5ae6c45873f72,
title = "On Hierarchical KPS: An Optimized KPS Against Collusion Attacks",
author = "Yuliang Zheng and Goichiro Hanaoka and Tsuyoshi Nishioka and Kanta Matsuura and Hideki Imai",
year = "1998",
language = "English",
isbn = "970 18 1960 8",
pages = "247 -- 250",
booktitle = "1998 Int. Symp. on Information Theory and its Applications Proceedings",
publisher = "National Polytechnic Institute of Mexico",
note = "International Symposium on Information Theory and Its Applications 1998, ISITA 1998 ; Conference date: 16-08-1998 Through 21-08-1998",
}