Shahrokh Saeednia Reihaneh Safavi-Naini Willy Susilo On Classifying Conference Key Distribution Protocols. 51-59 2001 conf/acisp/2001 ACISP http://link.springer.de/link/service/series/0558/bibs/2119/21190051.htm db/conf/acisp/acisp2001.html#SaeedniaSS01