Presentation 2021-11-12
Security notions of decryption-controllable identity-based encryption
Hidekazu Miyanaga, Atsushi Fujioka, Taroh Sasaki, Yuki Okano, Koutarou Suzuki, Kazuki Yoneyama,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In recent years, there have been increasing opportunities for a single user to have multiple devices. A similar situation will happen in identity-based cryptography, that is, a single user stores the private key in multiple devices. Therefore, in SCIS 2021, we proposed decryption-controllable identity-based encryption, where a user can add and remove devices storing the private key, and its security notion. This report considers selective and adaptive security of decryption-controllable identity-based encryption and defines three other security notions. We also discuss relations among the four security notions.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) identity-based encryption / multiple devices / decryption control
Paper # ISEC2021-43,SITE2021-37,LOIS2021-26
Date of Issue 2021-11-05 (ISEC, SITE, LOIS)

Conference Information
Committee SITE / ISEC / LOIS
Conference Date 2021/11/12(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Masaru Ogawa(Kobe Gakuin Univ.) / Tetsuya Izu(Fujitsu Labs.) / Toru Kobayashi(Nagasaki Univ.)
Vice Chair Takushi Otani(Kibi International Univ.) / Takeo Tatsumi(Open Univ. of Japan) / Noboru Kunihiro(Tsukuba Univ.) / Goichiro Hanaoka(AIST) / Hiroyuki Toda(NTT)
Secretary Takushi Otani(Yamaguchi Pref Univ.) / Takeo Tatsumi(Hokuriku Univ.) / Noboru Kunihiro(Fujitsu Labs.) / Goichiro Hanaoka(Ibaraki Univ.) / Hiroyuki Toda(Nagasaki Univ.)
Assistant Hideyuki Fujii(NRI-Secure) / Yusuke Tachibana(Fukuoka Inst. of Tech.) / Takahiro Matsuda(AIST) / Kazuki Fukae(Nagasaki Univ.)

Paper Information
Registration To Technical Committee on Social Implications of Technology and Information Ethics / Technical Committee on Information Security / Technical Committee on Life Intelligence and Office Information Systems
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Security notions of decryption-controllable identity-based encryption
Sub Title (in English)
Keyword(1) identity-based encryption
Keyword(2) multiple devices
Keyword(3) decryption control
1st Author's Name Hidekazu Miyanaga
1st Author's Affiliation Kanagawa University(Kanagawa Univ.)
2nd Author's Name Atsushi Fujioka
2nd Author's Affiliation Kanagawa University(Kanagawa Univ.)
3rd Author's Name Taroh Sasaki
3rd Author's Affiliation Kanagawa University(Kanagawa Univ.)
4th Author's Name Yuki Okano
4th Author's Affiliation NTT Secure Platform Laboratories(NTT)
5th Author's Name Koutarou Suzuki
5th Author's Affiliation Toyohashi University of Technology(Toyohashi Univ. of Tech.)
6th Author's Name Kazuki Yoneyama
6th Author's Affiliation Ibaraki University(Ibaraki Univ.)
Date 2021-11-12
Paper # ISEC2021-43,SITE2021-37,LOIS2021-26
Volume (vol) vol.121
Number (no) ISEC-239,SITE-240,LOIS-241
Page pp.pp.13-17(ISEC), pp.13-17(SITE), pp.13-17(LOIS),
#Pages 5
Date of Issue 2021-11-05 (ISEC, SITE, LOIS)