Study on Theoretical Foundation of Undeniable Signature Scheme

• Project/Area Number: 19500005
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fundamental theory of informatics
• Research Institution: Ibaraki University
• Principal Investigator: KUROSAWA Kaoru Ibaraki University, 工学部, 教授 (60153409)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2007: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 暗号系 / デジタル署名 / 否認不可署名 / 汎用結合安全性 / RSA / 公開鍵 / universal composability

Research Abstract

否認不可署名方式は、ソフトウエアのライセンス発行、電子現金、電子投票、電子オークション、電子入札など、多くの応用を有する。本研究では、汎用結合安全性(どのように複雑なプロトコルに組み込んでも元の安全性が保たれるという性質)を満たす方式を初めて検討すると共に、発行済みの否認不可署名を通常のデジタル署名に変換することが可能な方式を、標準モデルにおいて始めて開発した。

Research Products

• [Journal Article] New RSA-Based(Selectively)Convertible Undeniable Signature Schemes (2009)
  • Author(s): Le Trieu Phong, Kaoru Kurosawa and Wakaha Ogata
  • Journal Title: AfricaCrypt 2009 LNCS5580
  • NAID: 10026862305
  • Peer Reviewed
• [Journal Article] New RSA-Based (Selectively) Convertible Undeniable Signature Schemes (2009)
  • Author(s): Le Trieu Phong, Kaoru Kurosa wa and Wakaha Ogata
  • Journal Title: AfricaCrypt 2009 LNCS5580 Pages: 116-134
  • NAID: 10026862305
  • Peer Reviewed
• [Journal Article] Universally Composable Undeniable Signature (2008)
  • Author(s): Kaoru Kurosawa and Jun Furukawa
  • Journal Title: ICALP(2) LNCS5126 Pages: 524-535
  • Peer Reviewed
• [Journal Article] Universally Composable Undeniable Signature (2008)
  • Author(s): Kaoru Kurosawa and Jun Furukawa
  • Journal Title: ICALP 2008 (2) LNCS5126 Pages: 524-535
  • Peer Reviewed
• [Journal Article] Universally Composable Undeniable Signature (2008)
  • Author(s): K. Kurosawa and J. Furukawa
  • Journal Title: ICALP 2008, accepted LNCS Pages: 524-535
  • Peer Reviewed
• [Presentation] New RSA-Based(Selectively)Convertible Undeniable Signature Schemes (2009)
  • Author(s): Le Trieu Phong, Kaoru Kurosawa and Wakaha Ogata
  • Organizer: 2009年暗号と情報セキュリティシンポジウム
  • Place of Presentation: 滋賀県大津市大津プリンスホテル
  • Year and Date: 2009-01-22
• [Presentation] New RSA-Based (Selectively) Convertible Undeniable Signature Schemes (2009)
  • Author(s): Le Trieu Phong, Kaoru Kurosa wa and Wakaha Ogata
  • Organizer: 2009年暗号と情報セキュリティシンポジウム(SCIS 2009)
  • Place of Presentation: 滋賀県大津市大津プリンスホテル
  • Year and Date: 2009-01-22
• [Presentation] Universally Composable Undeniable Signature (2008)
  • Author(s): K. Kurosawa and J. Furukawa
  • Organizer: IACR Technical Report, ePrint 2008/094
  • Place of Presentation: IACRのWebサイト
• [Remarks]
  • URL: http://info.ibaraki.ac.jp/scripts/websearch/index.htm
• [Remarks] 茨城大学研究者情報総覧
  • URL: http://info.ibaraki.ac.jp/scripts/websearch/index.htm