Directcha: A proposal of spatiometric mental rotation CAPTCHA

Ayane Sano, Masahiro Fujita, Masakatsu Nishigaki. Directcha: A proposal of spatiometric mental rotation CAPTCHA. In 14th Annual Conference on Privacy, Security and Trust, PST 2016, Auckland, New Zealand, December 12-14, 2016. pages 585-592, IEEE, 2016. [doi]

Authors

Ayane Sano

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Masahiro Fujita

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Masakatsu Nishigaki

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