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| Presentation | 2010-07-01 13:25 On the truncated path search for the maximum differential characteristic probability on a generalized Feistel-type block cipher Yasutaka Igarashi, Toshinobu Kaneko (Tokyo Univ. of Science)  ISEC2010-13 SITE2010-9 ICSS2010-19 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We study a Viterbi search for the maximum differential characteristic probability ($DCP_{max}$) of a block cipher with a generalized Feistel structure, referred to as a generalized Feistel-type cipher (GFC). $DCP_{max}$ is a security index of differential cryptanalysis. The upper bound of $DCP_{max}$ is given by a truncated-path search with Viterbi algorithm. We show that the truncated-path search gives an imaginary path as the resultant optimum path in GFC, which cannot be connected as a real path. We also propose a new search algorithm to avoid such imaginary paths. Our algorithm can give the upper bound of $DCP_{max}$ tighter than conventional one. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Feistel / Viterbi algorithm / differential characteristic probability / truncation / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 113, ISEC2010-13, pp. 21-25, July 2010. | |
| Paper # | ISEC2010-13 | |
| Date of Issue | 2010-06-24 (ISEC, SITE, ICSS) | |
| 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 | ISEC2010-13 SITE2010-9 ICSS2010-19 |
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| Conference Information | |
| Committee | ISEC IPSJ-CSEC SITE ICSS |
| Conference Date | 2010-07-01 - 2010-07-02 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hirosaki University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | ISEC |
| Conference Code | 2010-07-ISEC-CSEC-SITE-ICSS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On the truncated path search for the maximum differential characteristic probability on a generalized Feistel-type block cipher |
| Sub Title (in English) | |
| Keyword(1) | Feistel |
| Keyword(2) | Viterbi algorithm |
| Keyword(3) | differential characteristic probability |
| Keyword(4) | truncation |
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| Keyword(6) | |
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| Keyword(8) | |
| 1st Author's Name | Yasutaka Igarashi |
| 1st Author's Affiliation | Tokyo University of Science (Tokyo Univ. of Science) |
| 2nd Author's Name | Toshinobu Kaneko |
| 2nd Author's Affiliation | Tokyo University of Science (Tokyo Univ. of Science) |
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| Speaker | Author-1 |
| Date Time | 2010-07-01 13:25:00 |
| Presentation Time | 25 minutes |
| Registration for | ISEC |
| Paper # | ISEC2010-13, SITE2010-9, ICSS2010-19 |
| Volume (vol) | vol.110 |
| Number (no) | no.113(ISEC), no.114(SITE), no.115(ICSS) |
| Page | pp.21-25 |
| #Pages | 5 |
| Date of Issue | 2010-06-24 (ISEC, SITE, ICSS) |
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