| Presentation | 2015-03-03 A Study on CAPTCHA System Using Differential Awkwardness-Obi ects Michitomo YAMAGUCHI, Takeshi OKAMOTO, Hiroaki KIKUCHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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 difficulty 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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CAPTCHA / Markov chain / Word salad / Security analysis |
| Paper # | ICSS2014-72 |
| Date of Issue |
| Conference Information | |
| Committee | ICSS |
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| Conference Date | 2015/2/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Information and Communication System Security (ICSS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on CAPTCHA System Using Differential Awkwardness-Obi ects |
| Sub Title (in English) | |
| Keyword(1) | CAPTCHA |
| Keyword(2) | Markov chain |
| Keyword(3) | Word salad |
| Keyword(4) | Security analysis |
| 1st Author's Name | Michitomo YAMAGUCHI |
| 1st Author's Affiliation | Department of Mathematical Modeling, Analysis and Simulation, Graduate School of Advanced Mathematical Sciences, Meiji University() |
| 2nd Author's Name | Takeshi OKAMOTO |
| 2nd Author's Affiliation | Graduate School of Technology and Sciences, Tsukuba University of Technology |
| 3rd Author's Name | Hiroaki KIKUCHI |
| 3rd Author's Affiliation | Department of Mathematical Modeling, Analysis and Simulation, Graduate School of Advanced Mathematical Sciences, Meiji University |
| Date | 2015-03-03 |
| Paper # | ICSS2014-72 |
| Volume (vol) | vol.114 |
| Number (no) | 489 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |