A secure annuli CAPTCHA system

Suggested Citation

Zhang J., Tsai M.Y., Kitchat K., Sun M.T., Sakai K., Ku W.S., Surasak T., Thaipisutikul T. A secure annuli CAPTCHA system. Computers and Security Vol.125 (2023). doi:10.1016/j.cose.2022.103025 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81783

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