| Presentation | 2017-12-22 Optimizing Bleichenbacher's Attack on Schnorr-Type Signatures with Barely Biased Nonces Akira Takahashi, Mehdi Tibouchi, Masayuki Abe, Tatsuaki Okamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Bleichenbacher's attack is a key recovery attack technique exploiting biased nonces in Schnorr-type signatures. While attacking very small biases was thought to be out of reach inprevious work due to high memory consumption, we tackle the problem using the Schroeppel--Shamir algorithm, whichallows us to trade space complexity for time complexity. We provide a concrete estimate of the time-memory trade-off obtained withthat approach and demonstrate that it makes the attack achievable inpractice against groups of larger order and smaller nonce biases thanpreviously thought tractable. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Schnorr-type signature / Nonce bias / Bleichenbacher’s attack |
| Paper # | ISEC2017-84,COMP2017-38 |
| Date of Issue | 2017-12-14 (ISEC, COMP) |
| Conference Information | |
| Committee | ISEC / COMP |
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| Conference Date | 2017/12/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Eikokuji Campus, Kochi University of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Kazuto Ogawa(NHK) / Hiro Ito(Univ. of Electro-Comm.) |
| Vice Chair | Atsushi Fujioka(Kanagawa Univ.) / Shiho Moriai(NICT) / Yushi Uno(Osaka Pref. Univ.) |
| Secretary | Atsushi Fujioka(Tohoku Univ.) / Shiho Moriai(Tokai Univ.) / Yushi Uno(Seikei Univ.) |
| Assistant | Keita Emura(NICT) / Yuichi Komano(TOSHIBA) / Yuuji Suga(IIJ) |
| Paper Information | |
| Registration To | Technical Committee on Information Security / Technical Committee on Theoretical Foundations of Computing |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optimizing Bleichenbacher's Attack on Schnorr-Type Signatures with Barely Biased Nonces |
| Sub Title (in English) | |
| Keyword(1) | Schnorr-type signature |
| Keyword(2) | Nonce bias |
| Keyword(3) | Bleichenbacher’s attack |
| 1st Author's Name | Akira Takahashi |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Mehdi Tibouchi |
| 2nd Author's Affiliation | NTT Secure Platform Laboratories(NTT) |
| 3rd Author's Name | Masayuki Abe |
| 3rd Author's Affiliation | NTT Secure Platform Laboratories(NTT) |
| 4th Author's Name | Tatsuaki Okamoto |
| 4th Author's Affiliation | NTT Secure Platform Laboratories(NTT) |
| Date | 2017-12-22 |
| Paper # | ISEC2017-84,COMP2017-38 |
| Volume (vol) | vol.117 |
| Number (no) | ISEC-369,COMP-370 |
| Page | pp.pp.83-88(ISEC), pp.83-88(COMP), |
| #Pages | 6 |
| Date of Issue | 2017-12-14 (ISEC, COMP) |