"Kazuyuki Nagata,Joong-sun Lee,Kenichi Fukuda,Yoshiaki Iwamaru,Eikazu Niwano,Masuyoshi Yachida,NAOKO TAIRA,HIROYUKI SUZUKI,TAKASHI OBI,nagaaki ohyama","A study on a method of identity verification in blockchains","第170回マルチメディア通信と分散処理・第76回コンピュータセキュリティ合同研究発表会","研究報告マルチメディア通信と分散処理（DPS）","情報処理学会","  2017-DPS-170","  19","  1-6",2017,Feb.
"Kazushige Fujita,TAKASHI OBI,Masuyoshi Yachida,Joong-sun Lee,NAOKO TAIRA,Makoto Oku,Eikazu Niwano,則武 智,Kenichi Fukuda,Yoshiaki Iwamaru,nagaaki ohyama","A study on the possibility of utilizing the Public Certification Service for Individuals in the field of finance or credit settlement.",,"信学技報",,"Vol. 114","no. 500","pp. 135-140",2015,Mar.
"Kazushige Fujita,TAKASHI OBI,Chikahiro Miyokawa,Masuyoshi Yachida,Joong-sun Lee,Tetsuya Natsume,NAOKO TAIRA,Eikazu Niwano,熊倉 誠,Yoshiaki Iwamaru,nagaaki ohyama","A study on cooperation between the public sector and the private sector by utilizing the Public Certification Service for Individuals","ライフインテリジェンスとオフィス情報システム研究会","信学技報","電子情報通信学会","Vol. 113","No. 381","pp. 29-34",2014,Jan.
"Chikahiro Miyokawa,TAKASHI OBI,Kazushige Fujita,Masuyoshi Yachida,Joong-sun Lee,Tetsuya Natsume,Naoko Taira,Eikazu Niwano,Makoto Kumakura,Yoshiaki Iwamaru,nagaaki ohyama","A Study on Visualization of Business Process Flow of Information Transfer Network System (My Number System) Using BPMN","ライフインテリジェンスとオフィス情報システム研究会","信学技報",,"vol. 112","no. 305","pp. 69-74",2012,Nov.
"Joong-sun Lee,TAKASHI OBI,Takahiro Yokoyama,Masuyoshi Yachida,平良奈緒子,Eikazu Niwano,Chikahiro Miyokawa,Yoshiaki Iwamaru,nagaaki ohyama","情報連携基盤のビジネスプロセスフローの制御に係るセキュリティに関する研究","ライフインテリジェンスとオフィス情報システム研究会","信学技報",,"vol. 111","no. 470","pp. 225-229",2012,Mar.