| Presentation | 2022-03-07 Online/Offline Accountable-Subgroup Multi-signature Shintaro Yamashita, Tian Yangguang, Atsuko Miyaji, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Accountable Subgroup Multisignature (ASM) enables any subgroup of signers from a group to produce a multi-signature for a message on behalf of the group. In particular, the subgroup of signers is held accountable for the signed message. Recently, Boneh et al. proposed a compact AMS scheme from BLS signatures ensuring signature compression and public-key aggregation. In this work, we introduce a new ASM scheme that supports the online/offline signing process. Our scheme is based on Boneh et al.'s ASM scheme and the standard discrete-logarithm chameleon hash functions. We allow signature compression and public-key aggregation to be performed offline. Online signing only requires a signer from the group to perform a collision-finding process when a real message is available without modifying the compressed signature. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Accountable Subgroup Multisignature / Chameleon Hash / Online/Offline / Aggregate signature |
| Paper # | ICSS2021-64 |
| Date of Issue | 2022-02-28 (ICSS) |
| Conference Information | |
| Committee | ICSS / IPSJ-SPT |
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| Conference Date | 2022/3/7(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Security, Trust, etc. |
| Chair | Katsunari Yoshioka(Yokohama National Univ.) |
| Vice Chair | Kazunori Kamiya(NTT) / Takahiro Kasama(NICT) |
| Secretary | Kazunori Kamiya(KDDI labs.) / Takahiro Kasama(Okayama Univ.) |
| Assistant | Keisuke Kito(Mitsubishi Electric) / Takeshi Sugawara(Univ. of Electro-Comm.) |
| Paper Information | |
| Registration To | Technical Committee on Information and Communication System Security / Special Interest Group on Security Psychology and Trust |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Online/Offline Accountable-Subgroup Multi-signature |
| Sub Title (in English) | * |
| Keyword(1) | Accountable Subgroup Multisignature |
| Keyword(2) | Chameleon Hash |
| Keyword(3) | Online/Offline |
| Keyword(4) | Aggregate signature |
| 1st Author's Name | Shintaro Yamashita |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Tian Yangguang |
| 2nd Author's Affiliation | Osaka University(Osaka Univ.) |
| 3rd Author's Name | Atsuko Miyaji |
| 3rd Author's Affiliation | Osaka University(Osaka Univ.) |
| Date | 2022-03-07 |
| Paper # | ICSS2021-64 |
| Volume (vol) | vol.121 |
| Number (no) | ICSS-410 |
| Page | pp.pp.32-37(ICSS), |
| #Pages | 6 |
| Date of Issue | 2022-02-28 (ICSS) |