- 2015/12 - International Conference on Provable Security (ProvSec 2015) Organizing committee member
- 2015/10 - the 14th International Workshop on Digital-Forensics and Watermarking (IWDW2015), Tokyo, Japan Organizing chair
- 2015/09 - the 11th IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2015), Adelaide, Australia Program chair
- 2015/08 - the 5th International Workshop on Resilience and ICT for Secure Open Cities (RISI2015) Workshop chair
- 2015/06 - Workshop on Privacy by Transparency in Data-Centric Services (PTDCS2015), Poznan, Poland Workshop organizer
- 2015/02 - 電子情報通信学会 英文論文誌D 「高機能マルチメディア」特集号,2016年1月出版 編集委員長
- 2014/12 - 情報処理学会 論文誌「社会に浸透していくコンピュータセキュリティ技術」特集 編集幹事
- 2014/08 - the 4th International Workshop on Resilience and ICT for Secure Open Cities (RISI2014), Fribourg, Switzerland Workshop chair
- 2014/05 - IFIP TC8-information systems: WG8.4- E-Business Information Systems: Multi-disciplinary research and practice WG Secretary
- 2014/04 - IFIP Information & Communication Technology-EurAsia Conference (IFIP ICT-EURASIA 2014), Bali, Indonesia Program chair
- 2014 - Special issue on Secure Communications, Telecommunication Systems, Springer Guest Editor
- 2014 - Multidimensional Systems and Signal Processing, Springer Associate editor
- 2014 - Journal of Innovation in Digital Ecosystems, Elsevier Editorial board member
- 2013/10 - the 9th IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP2013), Beijing, China Conference chair
- 2013/08 - NII Shonan meeting: Privacy by Transparency for Data-Centric Services, Prague, Kanagawa, Japan Organizer
- 2013/08 - the 3rd International Workshop on Resilience and ICT for Secure Open Cities (RISI2013), Regensburg, Germany Workshop chair
- 2013/04 - 国立情報学研究所 知的財産委員会 委員長
- 2013/04 - 情報処理学会 若手研究者の会,IE領域幹事 幹事
- 2013/04 - 電子情報通信学会 マルチメディア情報ハイディング・エンリッチメント研究専門委員会(EMM) 委員長
- 2012/06 - 情報処理学会論文誌 査読委員
- 2012/05 - 情報処理学会 コンピュータセキュリティ研究会(CSEC) 専門委員
- 2010/05 - 電子情報通信学会 和文論文誌A 常任査読委員
- 2009 - Business & Information Systems Engineering (BISE), Springer Editorial board member
- 2008 - Faculty of Information Technology, University of Science, Vietnam National University ?Ho Chi Minh City- (VNU-HCM) Co-supervisor of graduate students