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| Presentation | 2015-03-03 17:05 A Study on CAPTCHA System Using Differential Awkwardness-Objects Michitomo Yamguchi (Meiji Univ.), Takeshi Okamoto (Tsukuba Univ. of Tech.), Hiroaki Kikuchi (Meiji Univ.)  ICSS2014-72 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | CAPTCHAs have been accepted as a technique which prevents unauthorized access by bots. Several researchers point out that conventional CAPTCHAs become insecure due to recent advances on recognition techniques, so CAPTCHAs with human's congnition capatility, i.e. differentiation between natural and awkward objects, have been studied. However, it is vulnerable against adversaries who use the difference on relative frequency between them because of the difficluty collecting natural objects. Our scheme needs no use natural objects and improves the shortcoming. In this paper, we apply our proposal to conventional questions which make humans differentiate natural sentences from word salads and evaluate it by several experiments. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | CAPTCHA / Markov chain / Word salad / Security analysis / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 489, ICSS2014-72, pp. 55-60, March 2015. | |
| Paper # | ICSS2014-72 | |
| Date of Issue | 2015-02-24 (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 | ICSS2014-72 |
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| Conference Information | |
| Committee | ICSS |
| Conference Date | 2015-03-03 - 2015-03-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Meio Univiersity |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Communication Security, etc. |
| Paper Information | |
| Registration To | ICSS |
| Conference Code | 2015-03-ICSS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on CAPTCHA System Using Differential Awkwardness-Objects |
| Sub Title (in English) | |
| Keyword(1) | CAPTCHA |
| Keyword(2) | Markov chain |
| Keyword(3) | Word salad |
| Keyword(4) | Security analysis |
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| 1st Author's Name | Michitomo Yamguchi |
| 1st Author's Affiliation | Meiji University (Meiji Univ.) |
| 2nd Author's Name | Takeshi Okamoto |
| 2nd Author's Affiliation | Tsukuba University of Technology (Tsukuba Univ. of Tech.) |
| 3rd Author's Name | Hiroaki Kikuchi |
| 3rd Author's Affiliation | Meiji University (Meiji Univ.) |
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| Speaker | Author-1 |
| Date Time | 2015-03-03 17:05:00 |
| Presentation Time | 25 minutes |
| Registration for | ICSS |
| Paper # | ICSS2014-72 |
| Volume (vol) | vol.114 |
| Number (no) | no.489 |
| Page | pp.55-60 |
| #Pages | 6 |
| Date of Issue | 2015-02-24 (ICSS) |
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