Formal Security Treatments for IBE-to-Signature Transformation : Relations among Security Notions

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概要

• 論文の詳細を見る

• In a seminal paper of identity based encryption (IBE), Boneh and Franklin [6] mentioned an interesting transform from an IBE scheme to a signature scheme, which was observed by Moni Naor. In this paper, we give formal security treatments for this transform and discover several implications and separations among security notions of IBE and transformed signature. For example, we show for such a successful transform, one-wayness of IBE is an essential condition. Additionally, we give a sufficient and necessary condition for converting a semantically secure IBE scheme into an existentially unforgeable signature scheme. Our results help establish strategies on design and automatic security proof of signature schemes from (possibly weak) IBE schemes. We also show some separation results which strongly support that one-wayness, rather than semantic security, of IBE captures an essential condition to achieve secure signature.

• （社）電子情報通信学会の論文
• 2009-01-01

著者

• IMAI Hideki

  Chuo University

• Imai H

  National Inst. Of Advanced Industrial Sci. And Technol. Tokyo Jpn

• Imai Hideki

  Faculty Of Science And Engineering Chuo University:research Center For Information Security (rcis) N

• HANAOKA Goichiro

  National Institute of Advanced Industrial Science and Technology

• IMAI Hideki

  National Institute of Advanced Industrial Science and Technology

• Hanaoka Goichiro

  Research Center For Information Security (rcis) National Institute Of Advanced Industrial Science &a

• Hanaoka Goichiro

  Institute Of Industrial Science The University Of Tokyo

• Hanaoka Goichiro

  3rd Department Institute Of Industrial Science The University Of Tokyo

• Zhang Rui

  National Institute Of Advanced Industrial Science And Technology (aist)

• Zhang R

  Univ. Tokushima School Of Medicine Tokushima Jpn

• Zhang Rui

  National Inst. Advanced Industrial Sci. And Technol. Tokyo Jpn

• Imai Hideki

  National Inst. Of Advanced Industrial Sci. & Technol. (aist) Tokyo Jpn

• CUI Yang

  National Institute of Advanced Industrial Science and Technology (AIST)

• FUJISAKI Eiichiro

  NTT Information Sharing Platform Laboratories, NTT Corporation

• Hanaoka G

  National Institute Of Advanced Industrial Science And Technology

• Zhang R

  Yale Univ. Ct Usa

• Hanaoka Goichiro

  National Inst. Of Advanced Industrial Sci. And Technol. Tokyo Jpn

• Cui Yang

  Research Center For Information Security (rcis) National Institute Of Advanced Industrial Science &a

• Imai Hideki

  National Inst. Advanced Industrial Sci. And Technol. Tokyo Jpn

• Fujisaki Eiichiro

  Ntt Information Sharing Platform Laboratories Ntt Corporation

• Imai Hideki

  National Astronomical Observatory

• Fujisaki Eiichiro

  Ntt Information Sharing Platform Laboratories Ntt Corp.

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