Presentation | 2023-03-14 Identity-based Matchmaking Encryption Secure against the KGC Sohto Chiku, Keisuke Hara, Junji Shikata, |
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PDF Download Page | PDF download Page Link |
Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | Identity-based matchmaking encryption (IB-ME) is an extention of identity-based encryption (IBE) where both the sender and receiver can specify the intended identities each other. The key escrow problem wherein the authority is centered at the key generation center has been pointed out as one of the most important issues, when implementing IBE in the real world. Recently, an approach to solving the key escrow problem in IBE by introducing a new entity called an identity certificate authority (ICA) was proposed. In this paper, we extend the approach above in order to solve the key escrow problem for IBE to the IB-ME setting. Specifically, we first propose a novel formalization of IB-ME by solving the key escrow problem by introducing ICA in its formulation. We call this new type of IB-ME a blind IB-ME with certified identities. Thereafter, we provide a concrete construction of a blind IB-ME with certified identities, based on the standard assumptions over the bilinear groups. Finally, we implement our proposed scheme and demonstrate it is practically efficient compared to existing schemes. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | Identity-based matchmaking encryption / Key escrow problem / Bilinear groups |
Paper # | IT2022-96,ISEC2022-75,WBS2022-93,RCC2022-93 |
Date of Issue | 2023-03-07 (IT, ISEC, WBS, RCC) |
Conference Information | |
Committee | RCC / ISEC / IT / WBS |
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Conference Date | 2023/3/14(2days) |
Place (in Japanese) | (See Japanese page) |
Place (in English) | |
Topics (in Japanese) | (See Japanese page) |
Topics (in English) | |
Chair | Shunichi Azuma(Nagoya Univ.) / Noboru Kunihiro(Tsukuba Univ.) / Tetsuya Kojima(Tokyo Kosen) / Takashi Shono(Wind River) |
Vice Chair | Shunichi Azuma(Hokkaido Univ.) / Koji Ishii(Kagawa Univ.) / Junji Shikata(Yokohama National Univ.) / Goichiro Hanaoka(AIST) / Yasuyuki Nogami(Okayama Univ.) / Hiroyasu Ishikawa(Nihon Univ.) / Hideki Ochiai(Yokohama National Univ.) |
Secretary | Shunichi Azuma(CRIEPI) / Koji Ishii(Ritsumeikan Univ.) / Junji Shikata(AIST) / Goichiro Hanaoka(Ibaraki Univ.) / Yasuyuki Nogami(Saitamai Univ.) / Hiroyasu Ishikawa(Nagaoka Univ. of Tech.) / Hideki Ochiai(Okayama Prefectural Univ.) |
Assistant | SHAN LIN(NICT) / Ryosuke Adachi(Yamaguchi Univ.) / Yoshikazu Hanatani(Toshiba) / Takayuki Nozaki(Yamaguchi Univ.) / Sun Ran(Ibaraki Univ.) / Chen Na(NAIST) |
Paper Information | |
Registration To | Technical Committee on Reliable Communication and Control / Technical Committee on Information Security / Technical Committee on Information Theory / Technical Committee on Wideband System |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Identity-based Matchmaking Encryption Secure against the KGC |
Sub Title (in English) | |
Keyword(1) | Identity-based matchmaking encryption |
Keyword(2) | Key escrow problem |
Keyword(3) | Bilinear groups |
1st Author's Name | Sohto Chiku |
1st Author's Affiliation | Yokohama National University(YNU) |
2nd Author's Name | Keisuke Hara |
2nd Author's Affiliation | National Institute of Advanced Industrial Science and Technology/Yokohama National University(AIST/YNU) |
3rd Author's Name | Junji Shikata |
3rd Author's Affiliation | Yokohama National University(YNU) |
Date | 2023-03-14 |
Paper # | IT2022-96,ISEC2022-75,WBS2022-93,RCC2022-93 |
Volume (vol) | vol.122 |
Number (no) | IT-427,ISEC-428,WBS-429,RCC-430 |
Page | pp.pp.179-186(IT), pp.179-186(ISEC), pp.179-186(WBS), pp.179-186(RCC), |
#Pages | 8 |
Date of Issue | 2023-03-07 (IT, ISEC, WBS, RCC) |