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"On the security and usability of dynamic cognitive game CAPTCHAs."
Manar Mohamed et al. (2017)
- Manar Mohamed, Song Gao, Niharika Sachdeva, Nitesh Saxena, Chengcui Zhang, Ponnurangam Kumaraguru, Paul C. van Oorschot
:
On the security and usability of dynamic cognitive game CAPTCHAs. J. Comput. Secur. 25(3): 205-230 (2017)

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