Jianying Zhou Meng-Chow Kang Feng Bao HweeHwa Pang Applied Public Key Infrastructure - 4th International Workshop: IWAP 2005, Singapore, September 21-23, 2005 128 2005 978-1-58603-550-1 IOS Press Frontiers in Artificial Intelligence and Applications IWAP http://www.booksonline.iospress.nl/Content/View.aspx?piid=52 db/conf/iwap/iwap2005.html