| Presentation | 2021-05-19 [Invited Talk] Efficiency and Accuracy Improvements of Secure Floating-Point Addition over Secret Sharing (from IWSEC 2020) Kota Sasaki, Koji Nuida, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In secure multiparty computation (MPC), floating-point numbers should be handled in many potential applications, but these are basically expensive. In particular, for MPC based on secret sharing (SS), the floating-point addition takes many communication rounds though the addition is the most fundamental operation. In this paper, we propose an SS-based two-party protocol for floating-point addition with 13 rounds (for single/double precision numbers), which is much fewer than the milestone work of Aliasgari et al. in NDSS 2013 (34 and 36 rounds, respectively) and also fewer than the state of the art in the literature. Moreover, in contrast to the existing SS-based protocols which are all based on “roundTowardZero” rounding mode in the IEEE 754 standard, we propose another protocol with 15 rounds which is the first result realizing more accurate “roundTiesToEven” rounding mode. We also discuss possible applications of the latter protocol to secure Validated Numerics (a.k.a. Rigorous Computation) by implementing a simple example. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | secure multiparty computation / floating-point numbers / secret sharing |
| Paper # | ISEC2021-8 |
| Date of Issue | 2021-05-12 (ISEC) |
| Conference Information | |
| Committee | ISEC |
|---|---|
| Conference Date | 2021/5/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Shoichi Hirose(Univ. of Fukui) |
| Vice Chair | Tetsuya Izu(Fujitsu Labs.) / Noboru Kunihiro(Tsukuba Univ.) |
| Secretary | Tetsuya Izu(Tsukuba Univ.) / Noboru Kunihiro(Fujitsu Labs.) |
| Assistant | Kazuki Yoneyama(Ibaraki Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Information Security |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Talk] Efficiency and Accuracy Improvements of Secure Floating-Point Addition over Secret Sharing (from IWSEC 2020) |
| Sub Title (in English) | |
| Keyword(1) | secure multiparty computation |
| Keyword(2) | floating-point numbers |
| Keyword(3) | secret sharing |
| 1st Author's Name | Kota Sasaki |
| 1st Author's Affiliation | The University of Tokyo(The Univ. of Tokyo) |
| 2nd Author's Name | Koji Nuida |
| 2nd Author's Affiliation | Kyushu University(Kyushu Univ.) |
| Date | 2021-05-19 |
| Paper # | ISEC2021-8 |
| Volume (vol) | vol.121 |
| Number (no) | ISEC-22 |
| Page | pp.pp.33-33(ISEC), |
| #Pages | 1 |
| Date of Issue | 2021-05-12 (ISEC) |