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| Presentation | 2021-03-04 10:15 Analysis of a new linear bias in the input/output difference of Salsa20 Ryo Watanabe, Atsuko Miyaji (Osaka Univ.)  IT2020-120 ISEC2020-50 WBS2020-39 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Among cryptographic techniques, Salsa20, a stream cipher, is the predecessor of ChaCha20, which was selected for TLS 1.3, and its security analysis is an important issue. In Salsa20, vulnerabilities are analyzed by Differential Analysis using the bias of specific input and output differences. In this study, we focus on the input/output difference of Salsa20 and experimentally find a new linear bias for multiple input and output difference. In addition, we theoretically analyze the occurrence probability of the new linear biases that we discovered, as well as some of the linear biases that had been discovered in existing studies. This will contribute to the construction of more secure cryptography by clarifying the structure of stream ciphers that lead to vulnerabilities. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Stream cipher / Salsa20 / Differential Analysis / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 411, ISEC2020-50, pp. 52-57, March 2021. | |
| Paper # | ISEC2020-50 | |
| Date of Issue | 2021-02-25 (IT, ISEC, WBS) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | IT2020-120 ISEC2020-50 WBS2020-39 |
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| Conference Information | |
| Committee | WBS IT ISEC |
| Conference Date | 2021-03-04 - 2021-03-05 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Joint Meeting of WBS, IT, and ISEC |
| Paper Information | |
| Registration To | ISEC |
| Conference Code | 2021-03-WBS-IT-ISEC |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Analysis of a new linear bias in the input/output difference of Salsa20 |
| Sub Title (in English) | |
| Keyword(1) | Stream cipher |
| Keyword(2) | Salsa20 |
| Keyword(3) | Differential Analysis |
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| 1st Author's Name | Ryo Watanabe |
| 1st Author's Affiliation | Osaka University (Osaka Univ.) |
| 2nd Author's Name | Atsuko Miyaji |
| 2nd Author's Affiliation | Osaka University (Osaka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-03-04 10:15:00 |
| Presentation Time | 25 minutes |
| Registration for | ISEC |
| Paper # | IT2020-120, ISEC2020-50, WBS2020-39 |
| Volume (vol) | vol.120 |
| Number (no) | no.410(IT), no.411(ISEC), no.412(WBS) |
| Page | pp.52-57 |
| #Pages | 6 |
| Date of Issue | 2021-02-25 (IT, ISEC, WBS) |
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