@techreport{weko_98793_1,
   author	 = "小澤賢佑 and 齊藤泰一",
   title	 = "Hierarchical Time-Released Proxy Re-Encryption",
   year 	 = "2014",
   institution	 = "東京電機大学, 東京電機大学",
   number	 = "11",
   month	 = "feb"
}