| Presentation | 2008-11-13 A Proposal of an Efficient Forward-Secure Group Signature Scheme Using Pairing Yuta HIRA, Toru NAKANISHI, Nobuo FUNABIKI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Group signature scheme is one of signature schemes which keep signer's identity information secret. To prevent a problem that an adversary who obtains valid user's secret key can forge the signature easily in conventional group signature schemes, an RSA-based group signature scheme with forward-security that means unforgeability for signatures signed before a key exposure was proposed. However, this scheme requires O(T) complexity for key up-dating or signing/verifying. Then, in this paper, we propose a pairing-based forward-secure group signature scheme with a key update of O(1) complexity and signing/verifying of O(log T) complexity, by adding a key updating based on a tree structure. We also show that the proposed scheme satisfies the forward-security. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | group signature / forward-security / pairing |
| Paper # | ISEC2008-80,OIS2008-56 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2008/11/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Proposal of an Efficient Forward-Secure Group Signature Scheme Using Pairing |
| Sub Title (in English) | |
| Keyword(1) | group signature |
| Keyword(2) | forward-security |
| Keyword(3) | pairing |
| 1st Author's Name | Yuta HIRA |
| 1st Author's Affiliation | Graduate School of Natural Science and Technology, Okayama University() |
| 2nd Author's Name | Toru NAKANISHI |
| 2nd Author's Affiliation | Graduate School of Natural Science and Technology, Okayama University |
| 3rd Author's Name | Nobuo FUNABIKI |
| 3rd Author's Affiliation | Graduate School of Natural Science and Technology, Okayama University |
| Date | 2008-11-13 |
| Paper # | ISEC2008-80,OIS2008-56 |
| Volume (vol) | vol.108 |
| Number (no) | 284 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |