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| Presentation | 2009-11-12 13:30 Constructing New Differential Path and Algebraic Cryptanalysis for Full-SHA-1 Makoto Sugita (NTT/AIST), Mitsuru Kawazoe (Osaka Prefecture Univ.), Hideki Imai (AIST/ Chuo Univ.)  ISEC2009-51 LOIS2009-40 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Since the cryptanalysis for SHA-1 was proposed [19], many improvements have been proposed. Recently a new result was proposed which claims that it can compute collisions in 252 SHA-1 computation, though it includes some problems [10]. Based on their attack, We had reconstructed their method algebraically using Gr¨obner basis based formulation. In this formulation, we propose a new method to construct differentials and sufficient conditions automatically from disturbance vector and also propose some more new techniques: round-wise semi-neutral bits, global boomerang and adaptive amplified boomerang techniques. Using these new methods, we obtained sufficient conditions of full SHA-1 based on the new disturbance vector offered in [10] and succeeded in implementation. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | SHA-1 / Gr¨obner basis / amplified boomerang attack / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 271, ISEC2009-51, pp. 1-8, Nov. 2009. | |
| Paper # | ISEC2009-51 | |
| Date of Issue | 2009-11-05 (ISEC, LOIS) | |
| ISSN | Print edition: ISSN 0913-5685 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 | ISEC2009-51 LOIS2009-40 |
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| Conference Information | |
| Committee | ISEC LOIS |
| Conference Date | 2009-11-12 - 2009-11-13 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Gifu Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | ISEC |
| Conference Code | 2009-11-ISEC-LOIS |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Constructing New Differential Path and Algebraic Cryptanalysis for Full-SHA-1 |
| Sub Title (in English) | |
| Keyword(1) | SHA-1 |
| Keyword(2) | Gr¨obner basis |
| Keyword(3) | amplified boomerang attack |
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| 1st Author's Name | Makoto Sugita |
| 1st Author's Affiliation | NTT Network innovation Laboratories/AIST (NTT/AIST) |
| 2nd Author's Name | Mitsuru Kawazoe |
| 2nd Author's Affiliation | Osaka Prefecture University (Osaka Prefecture Univ.) |
| 3rd Author's Name | Hideki Imai |
| 3rd Author's Affiliation | AISt/Chuo University (AIST/ Chuo Univ.) |
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| Speaker | Author-1 |
| Date Time | 2009-11-12 13:30:00 |
| Presentation Time | 25 minutes |
| Registration for | ISEC |
| Paper # | ISEC2009-51, LOIS2009-40 |
| Volume (vol) | vol.109 |
| Number (no) | no.271(ISEC), no.272(LOIS) |
| Page | pp.1-8 |
| #Pages | 8 |
| Date of Issue | 2009-11-05 (ISEC, LOIS) |
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