00317nas a2200133   4500000000100000000000100001008004100002260002400043100002100067700001200088700001000100700001200110245006100122       2019                            d  bSpringeraSingapore1 aMin-Shiang Hwang1 aChou YC1 aWu CC1 aYang CY00aAn Improvement of Tseng–Wu Group Key Exchange Protocol