| Presentation | 2014-09-05 Fail-Stop Signature Scheme with TTP and Its UC-Security Masahiro NOMURA, Katsuhiro NAKAMURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As security requirements of fail-stop signature (FSS) schemes, non-repudiability and unforgeability are required. In this paper, it is considered that FSS schemes are used in the environment where adversaries have huge (exponentially increasing) computational power. However, FSS schemes cannot satisfy non-repudiability in that environment, so an FSS scheme with a Trusted Third Party (TTP) is proposed as a system where it is not supposed that the signer trys to repudiate his signature. In order to use this scheme widely, it is discussed whether security is preserved even when an FSS scheme with a TTP is used as a sub-protocol in a larger system. That is, UC-security (Universally Composable Security) of an FSS scheme with a TTP is considered. In this discussion, an oracle is used to represent an adversary with huge (exponentially increasing) computational power. Then, it is shown that an FSS scheme with a TTP satisfies the UC-security with some conditions. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Digital Signature / Fail-Stop Signature / TTP / Non-Repudiability / Unforgeability / UC-Security |
| Paper # | ISEC2014-49 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2014/8/29(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) | Fail-Stop Signature Scheme with TTP and Its UC-Security |
| Sub Title (in English) | |
| Keyword(1) | Digital Signature |
| Keyword(2) | Fail-Stop Signature |
| Keyword(3) | TTP |
| Keyword(4) | Non-Repudiability |
| Keyword(5) | Unforgeability |
| Keyword(6) | UC-Security |
| 1st Author's Name | Masahiro NOMURA |
| 1st Author's Affiliation | Chiba University() |
| 2nd Author's Name | Katsuhiro NAKAMURA |
| 2nd Author's Affiliation | Chiba University |
| Date | 2014-09-05 |
| Paper # | ISEC2014-49 |
| Volume (vol) | vol.114 |
| Number (no) | 203 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |