| Presentation | 2020-10-26 Feasibility of lattice attacks on ECDSA Kotaro Abe, Makoto Ikeda, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | ECDSA secret key is recovered via lattice attacks when only a few bits of nonce$(k)$ are leaked. In this paper, we evaluate the feasibility of lattice attacks under various conditions for key length, the number of leaked bits and the number of signatures. The result suggests that increasing key length is not an effective countermeasure against lattice attacks though the amount of information about $k$ required for lattice attacks to recover the secret key increases as key length increases and that it is necessary to prevent side-channel attacks which leak a few bits of $k$. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ECDSA / lattice attacks / hidden number problem / side-channel attacks / lattice reduction / BKZ algorithm |
| Paper # | HWS2020-30,ICD2020-19 |
| Date of Issue | 2020-10-19 (HWS, ICD) |
| Conference Information | |
| Committee | ICD / HWS |
|---|---|
| Conference Date | 2020/10/26(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Hardware Security, etc. |
| Chair | Makoto Nagata(Kobe Univ.) / Makoto Ikeda(Univ. of Tokyo) |
| Vice Chair | Masafumi Takahashi(masafumi2.takahashi@kioxia.com) / Yasuhisa Shimazaki(Renesas Electronics) / Makoto Nagata(Kobe Univ.) |
| Secretary | Masafumi Takahashi(Socionext) / Yasuhisa Shimazaki(Osaka Univ.) / Makoto Nagata(Kyushu Univ.) |
| Assistant | Koji Nii(TSMC) / Kosuke Miyaji(Shinshu Univ.) / Takeshi Kuboki(Kyushu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Integrated Circuits and Devices / Technical Committee on Hardware Security |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Feasibility of lattice attacks on ECDSA |
| Sub Title (in English) | |
| Keyword(1) | ECDSA |
| Keyword(2) | lattice attacks |
| Keyword(3) | hidden number problem |
| Keyword(4) | side-channel attacks |
| Keyword(5) | lattice reduction |
| Keyword(6) | BKZ algorithm |
| 1st Author's Name | Kotaro Abe |
| 1st Author's Affiliation | The University of Tokyo(Tokyo Univ.) |
| 2nd Author's Name | Makoto Ikeda |
| 2nd Author's Affiliation | The University of Tokyo(Tokyo Univ.) |
| Date | 2020-10-26 |
| Paper # | HWS2020-30,ICD2020-19 |
| Volume (vol) | vol.120 |
| Number (no) | HWS-211,ICD-212 |
| Page | pp.pp.30-35(HWS), pp.30-35(ICD), |
| #Pages | 6 |
| Date of Issue | 2020-10-19 (HWS, ICD) |