Ai Fen Sui Sherman S. M. Chow Lucas Chi Kwong Hui Siu-Ming Yiu K. P. Chow Wai Wan Tsang C. F. Chong Kevin K. H. Pun H. W. Chan Separable and Anonymous Identity-Based Key Issuing. 275-279 2005 conf/icpads/2005 ICPADS (2) http://dx.doi.org/10.1109/ICPADS.2005.263 db/conf/icpads/icpads2005-2.html#SuiCHYCTCPC05