Abstract
This chapter describes the basic concepts underlying the CAPTCHA test. Specifically, the aim of the test is described, together with the main tasks of the CAPTCHA and the requirements that the test has to meet in order to guarantee a high security level. The CAPTCHA test is framed inside the human–computer interaction model and strongly connected with the concept of human interactive proofs, which are used to make a differentiation between the human users and computer bot programs.
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References
Ahn LV, Blum M, Hopper NJ, Langford J (2003) Captcha: using hard AI problems for security. In: Proceedings of theory and applications of cryptographic techniques: 22nd international conference (EUROCRYPT). Springer, Berlin, pp 294–311
Von Ahn L, Blum M, Langford J (2004) Telling humans and computers apart automatically. Commun ACM 47(2):57–60
CAPTCHA. http://www.captcha.net
Rui Y, Liu Z (2004) ARTiFACIAL: automated reverse turing test using FACIAL features. Multimed Syst 9(6):493–502
Chellapilla K, Larson K, Simard P, Czerwinski M (2005) Designing human friendly human interaction proofs (HIPs). In: Proceedings of SIGCHI conference on human factors in computing systems, pp 711–720
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Brodić, D., Amelio, A. (2020). CAPTCHA Basics. In: The CAPTCHA: Perspectives and Challenges. Smart Innovation, Systems and Technologies, vol 162. Springer, Cham. https://doi.org/10.1007/978-3-030-29345-1_4
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DOI: https://doi.org/10.1007/978-3-030-29345-1_4
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-030-29345-1
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