@techreport{weko_62607_1,
   author	 = "Tomomi,Yamasaki and Shunsuke,Inenaga and Daisuke,Ikeda and Hiroto,Yasuura",
   title	 = "Modeling Costs of Access Control with Various Key Management Systems",
   year 	 = "2009",
   institution	 = "Graduate School of Information Science and Electrical Engineering, Kyushu University, Japan, Graduate School of Information Science and Electrical Engineering, Kyushu University, Japan, Graduate School of Information Science and Electrical Engineering, Kyushu University, Japan, Graduate School of Information Science and Electrical Engineering, Kyushu University, Japan",
   number	 = "4",
   month	 = "jul"
}