Kwok-Yan Lam Xibin Zhao Siu Leung Chung Ming Gu Jia-Guang Sun Enhancing Grid Security Infrastructure to Support Mobile Computing Nodes. 42-54 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2908&spage=42 2003 conf/wisa/2003 WISA db/conf/wisa/wisa2003.html#LamZCGS03