| Presentation | 2022-11-18 Reducing Authentication Data Size in Decentralized Blacklistable Anonymous Credential System Using DualRing Atsuki Iriboshi, Toru Nakanishi, Katsunobu Imai, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For privacy protection, blacklistable anonymous credential systems have been proposed, where a user is authenticated without ID. However, the trust for the credential issuer is needed. Since such an entity cannot be assumed in public blockchain, a decentralized system has been proposed. In this previous system, a user is authenticated using a set of public-keys of users. Since the public-keys are on the blockchain, a user can prove that he is valid without a credential issuer by showing that his public-key is included in the public-key set. However, this previous system is inefficient, because the size of the authentication data is proportional to the number of users, due to a conventional OR proof with the public-keys. In this paper, we propose a system where the size of the authentication data is reduced to the log-order size, by combining a conventional blacklistable anonymous credential system with DualRing. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Blacklistable anonymous credential systems / DualRing / Blockchain / Privacy protection |
| Paper # | ISEC2022-44,SITE2022-48,LOIS2022-28 |
| Date of Issue | 2022-11-11 (ISEC, SITE, LOIS) |
| Conference Information | |
| Committee | ISEC / SITE / LOIS |
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| Conference Date | 2022/11/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Noboru Kunihiro(Tsukuba Univ.) / Takushi Otani(Kibi International Univ.) / Hiroyuki Toda(NTT) |
| Vice Chair | Junji Shikata(Yokohama National Univ.) / Goichiro Hanaoka(AIST) / Soichiro Morishita(Cyber Agent) / Takeo Tatsumi(Open Univ. of Japan) / Manabu Motegi(Takushoku Univ.) |
| Secretary | Junji Shikata(AIST) / Goichiro Hanaoka(Ibaraki Univ.) / Soichiro Morishita(NRI-Secure) / Takeo Tatsumi(Hokuriku Univ.) / Manabu Motegi(Nagasaki Univ.) |
| Assistant | Yoshikazu Hanatani(Toshiba) / Yusuke Tachibana(Fukuoka Inst. of Tech.) / Mana Sasagawa(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Information Security / Technical Committee on Social Implications of Technology and Information Ethics / Technical Committee on Life Intelligence and Office Information Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Reducing Authentication Data Size in Decentralized Blacklistable Anonymous Credential System Using DualRing |
| Sub Title (in English) | |
| Keyword(1) | Blacklistable anonymous credential systems |
| Keyword(2) | DualRing |
| Keyword(3) | Blockchain |
| Keyword(4) | Privacy protection |
| 1st Author's Name | Atsuki Iriboshi |
| 1st Author's Affiliation | Hiroshima University(Hiroshima Univ.) |
| 2nd Author's Name | Toru Nakanishi |
| 2nd Author's Affiliation | Hiroshima University(Hiroshima Univ.) |
| 3rd Author's Name | Katsunobu Imai |
| 3rd Author's Affiliation | Hiroshima University(Hiroshima Univ.) |
| Date | 2022-11-18 |
| Paper # | ISEC2022-44,SITE2022-48,LOIS2022-28 |
| Volume (vol) | vol.122 |
| Number (no) | ISEC-258,SITE-259,LOIS-260 |
| Page | pp.pp.85-91(ISEC), pp.85-91(SITE), pp.85-91(LOIS), |
| #Pages | 7 |
| Date of Issue | 2022-11-11 (ISEC, SITE, LOIS) |