Implementation of CAPTCHA suitable for mobile devices

Kentaro Aburada; Shotaro Usuzaki; Hisaaki Yamaba; Tetsuro Katayama; Masayuki Mukunoki; Mirang Park; Naonobu Okazaki

doi:10.1587/comex.2019GCL0060

Special Cluster in Conjunction with IEICE General Conference 2019

Implementation of CAPTCHA suitable for mobile devices

Kentaro Aburada, Shotaro Usuzaki, Hisaaki Yamaba, Tetsuro Katayama, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki

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Keywords: CAPTCHA, mobile web access, bot detection, automated attack

JOURNAL FREE ACCESS

2019 Volume 8 Issue 12 Pages 601-605

DOI https://doi.org/10.1587/comex.2019GCL0060

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Abstract

CAPTCHA is a technology designed to prevent automated programs (known as bots) from acquiring access to on-line accounts to send spam mail, manipulate vote numbers in on-line polls, or take other malicious actions. In addition, access to Web services has been incorporated into mobile devices, such as smartphones. However, because most CAPTCHAs are not designed for mobile devices, user-friendly CAPTCHA for mobile devices is required. Thus, we implemented CAPTCHA on mobile devices and evaluated its resistance to bots. Our CAPTCHA showed robustness against bots, with good usability.

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