Jun Zhang Fanyuan Ma Yingcai Bai Minglu Li Performance Analysis of Batch Rekey Algorithm for Secure Group Communications. 829-832 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3320&spage=829 2004 conf/pdcat/2004 PDCAT db/conf/pdcat/pdcat2004.html#ZhangMBL04