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| Presentation | 2011-07-21 14:25 A Study on Key Estimation of Stream Cipher based on Probabilistic Inference Algorithm Yuji Iikubo, Shunsuke Horii, Toshiyasu Matsushima (Waseda Univ.)  IT2011-11 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The stream cipher which is a kind of symmetric key algorithm, is a cryptosystem to generate ciphertext by XOR plaintext bits and keystream bits which obtained by input a secret key to pseudorandom number generator. In this paper, we formularize the problem of the attack to stream cipher by statisitical decision theory, and consider the optimal key estimation based on Bayesian criterion. We represent practical pseudorandom number generator as a probabilistic model, and propose the key estimation algorithm based on probabilistic inference one by representing it to graphical model. The proposed algorithm is evaluated by simulation, then consider the safety of the stream cipher. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | stream cipher / factor graph / sum-product algorithm / nonlinear combiner generator / E0 / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 142, IT2011-11, pp. 7-12, July 2011. | |
| Paper # | IT2011-11 | |
| Date of Issue | 2011-07-14 (IT) | |
| 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 | IT2011-11 |
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| Conference Information | |
| Committee | IT |
| Conference Date | 2011-07-21 - 2011-07-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okayama University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | IT |
| Conference Code | 2011-07-IT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Key Estimation of Stream Cipher based on Probabilistic Inference Algorithm |
| Sub Title (in English) | |
| Keyword(1) | stream cipher |
| Keyword(2) | factor graph |
| Keyword(3) | sum-product algorithm |
| Keyword(4) | nonlinear combiner generator |
| Keyword(5) | E0 |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yuji Iikubo |
| 1st Author's Affiliation | Waseda University (Waseda Univ.) |
| 2nd Author's Name | Shunsuke Horii |
| 2nd Author's Affiliation | Waseda University (Waseda Univ.) |
| 3rd Author's Name | Toshiyasu Matsushima |
| 3rd Author's Affiliation | Waseda University (Waseda Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-07-21 14:25:00 |
| Presentation Time | 25 minutes |
| Registration for | IT |
| Paper # | IT2011-11 |
| Volume (vol) | vol.111 |
| Number (no) | no.142 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2011-07-14 (IT) |
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