00308nas a2200133   4500000000100000000000100001008004100002260001400043100001800057700002100075245006100096300001000157490000700167       2013                            d  cJan. 20131 aLi-Chin Huang1 aMin-Shiang Hwang00aA Conference Key Distribution Scheme in Tree Hierarchies  a59{640 v15