Robust CAPTCHA Image Generation Enhanced with Adversarial Example Methods

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dc.contributor.authorKwon, Hyunko
dc.contributor.authorYoon, Hyunsooko
dc.contributor.authorPark, Ki-Woongko
dc.date.accessioned2020-05-26T01:20:09Z-
dc.date.available2020-05-26T01:20:09Z-
dc.date.created2020-04-04-
dc.date.issued2020-04-
dc.identifier.citationIEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, v.E103D, no.4-
dc.identifier.issn1745-1361-
dc.identifier.urihttp://hdl.handle.net/10203/274287-
dc.description.abstractMalicious attackers on the Internet use automated attack programs to disrupt the use of services via mass spamming, unnecessary bulletin boarding, and account creation. Completely automated public turing test to tell computers and humans apart (CAPTCHA) is used as a security solution to prevent such automated attacks. CAPTCHA is a system that determines whether the user is a machine or a person by providing distorted letters, voices, and images that only humans can understand. However, new attack techniques such as optical character recognition (OCR) and deep neural networks (DNN) have been used to bypass CAPTCHA. In this paper, we propose a method to generate CAPTCHA images by using the fast-gradient sign method (FGSM), iterative FGSM (I-FGSM), and the DeepFool method. We used the CAPTCHA image provided by python as the dataset and Tensorflow as the machine learning library. The experimental results show that the CAPTCHA image generated via FGSM, I-FGSM, and DeepFool methods exhibits a 0% recognition rate with epsilon = 0.15 for FGSM, a 0% recognition rate with alpha = 0.1 with 50 iterations for I-FGSM, and a 45% recognition rate with 150 iterations for the DeepFool method.-
dc.languageEnglish-
dc.publisherIEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG-
dc.titleRobust CAPTCHA Image Generation Enhanced with Adversarial Example Methods-
dc.typeArticle-
dc.identifier.wosid000530667500017-
dc.identifier.scopusid2-s2.0-85081990475-
dc.type.rimsART-
dc.citation.volumeE103D-
dc.citation.issue4-
dc.citation.publicationnameIEICE TRANSACTIONS ON INFORMATION AND SYSTEMS-
dc.identifier.doi10.1587/transinf.2019edl8194-
dc.contributor.localauthorYoon, Hyunsoo-
dc.contributor.nonIdAuthorPark, Ki-Woong-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorCAPTCHA-
dc.subject.keywordAuthoradversarial example-
dc.subject.keywordAuthormachine learning-
dc.subject.keywordAuthordeep neural network-
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