Malicious Private-key Generator in Identity-based Authenticated-key Exchange

• Item type: Journal(1)
• 公開日: 2026-07-15
• タイトル / 言語: ja
• タイトル: Malicious Private-key Generator in Identity-based Authenticated-key Exchange
• タイトル / 言語: en
• タイトル: Malicious Private-key Generator in Identity-based Authenticated-key Exchange
• 言語: eng
• キーワード / 主題Scheme: Other
• キーワード / 主題: [一般論文] identity-based authenticated-key exchange, malicious private-key generator, id-neCK model, id-reCK model
• 資源タイプ / 資源タイプ識別子: http://purl.org/coar/resource_type/c_6501
• 資源タイプ: journal article
• 著者所属: Kanagawa University
• 著者所属: Kanagawa University
• 著者所属: Ibaraki University
• 著者所属: NTT Social Informatics Laboratories
• 著者所属: Toyohashi University of Technology
• 著者所属: Kogakuin University
• 著者所属(英): en
• 著者所属(英): Kanagawa University
• 著者所属(英): en
• 著者所属(英): Kanagawa University
• 著者所属(英): en
• 著者所属(英): Ibaraki University
• 著者所属(英): en
• 著者所属(英): NTT Social Informatics Laboratories
• 著者所属(英): en
• 著者所属(英): Toyohashi University of Technology
• 著者所属(英): en
• 著者所属(英): Kogakuin University
• 著者名: Kazuma,Wariki; Atsushi,Fujioka; Kazuki,Yoneyama; Akira,Nagai; Koutarou,Suzuki; Kan,Yasuda
• 著者名(英): Kazuma Wariki; Atsushi Fujioka; Kazuki Yoneyama; Akira Nagai; Koutarou Suzuki; Kan Yasuda
• 論文抄録 / 内容記述タイプ: Other
• 論文抄録 / 内容記述: This paper introduces two new security models for identity-based authenticated-key exchange (IBAKE): the id-neCK security model and the id-reCK security model. While most existing IBAKE models assume that the private-key generator (PKG) behaves honestly, the id-neCK model captures a malicious scenario in which an adversary can obtain the random string used by the PKG to generate the master public- and secret-keys. In contrast, the id-reCK model captures an attack in which an adversary can replace the master public- and secret-keys generated by an honest PKG. We prove that the id-reCK security notion is strictly stronger than both the id-neCK security notion and the existing id-eCK (identity-based extended Canetti-Krawczyk) security notion, which guarantees resistance against ephemeral private information leakage. Next, assuming the existence of a secure public-key cryptosystem, we show that there exists an IBAKE protocol that is id-eCK secure but not id-neCK secure. This implies that, under this assumption, the id-neCK security notion is strictly stronger than the id-eCK security notion. Finally, we discuss IBAKE protocols that satisfy these security notions.; ------------------------------; This is a preprint of an article intended for publication Journal of; Information Processing(JIP). This preprint should not be cited. This; article should be cited as: Journal of Information Processing Vol.34(2026) (online); DOI http://dx.doi.org/10.2197/ipsjjip.34.557; ------------------------------
• 論文抄録(英) / 内容記述タイプ: Other
• 論文抄録(英) / 内容記述: This paper introduces two new security models for identity-based authenticated-key exchange (IBAKE): the id-neCK security model and the id-reCK security model. While most existing IBAKE models assume that the private-key generator (PKG) behaves honestly, the id-neCK model captures a malicious scenario in which an adversary can obtain the random string used by the PKG to generate the master public- and secret-keys. In contrast, the id-reCK model captures an attack in which an adversary can replace the master public- and secret-keys generated by an honest PKG. We prove that the id-reCK security notion is strictly stronger than both the id-neCK security notion and the existing id-eCK (identity-based extended Canetti-Krawczyk) security notion, which guarantees resistance against ephemeral private information leakage. Next, assuming the existence of a secure public-key cryptosystem, we show that there exists an IBAKE protocol that is id-eCK secure but not id-neCK secure. This implies that, under this assumption, the id-neCK security notion is strictly stronger than the id-eCK security notion. Finally, we discuss IBAKE protocols that satisfy these security notions.; ------------------------------; This is a preprint of an article intended for publication Journal of; Information Processing(JIP). This preprint should not be cited. This; article should be cited as: Journal of Information Processing Vol.34(2026) (online); DOI http://dx.doi.org/10.2197/ipsjjip.34.557; ------------------------------
• 書誌レコードID / 収録物識別子タイプ: NCID
• 書誌レコードID / 収録物識別子: AN00116647
• 書誌情報: 情報処理学会論文誌; 巻 67, 号 7, 発行日 2026-07-15
• ISSN / 収録物識別子タイプ: ISSN
• ISSN / 収録物識別子: 1882-7764
• 公開者 / 言語: ja
• 公開者 / 出版者: 情報処理学会