Abstract
CaptchaStar is a new type of Captcha, proposed in 2016, based on shape recovery. This paper shows that the security of this Captcha is not as good as intended. More precisely, we present and implement an efficient attack on CaptchaStar with a success rate of 96%. The impact of this attack is also investigated in other scenarios as noise addition, and it continues to be very efficient. This paper is a revised version of the paper entitled How to break CaptchaStar, presented at the conference ICISSP 2018Â [29].
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CITATION STYLE
Gougeon, T., & Lacharme, P. (2019). A Simple Attack on CaptchaStar. In Communications in Computer and Information Science (Vol. 977, pp. 66–85). Springer Verlag. https://doi.org/10.1007/978-3-030-25109-3_4
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