December 2018
Intermediate to advanced
318 pages
8h 28m
English
Content preview from Hands-On Machine Learning for Cybersecurity
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Knocking Down CAPTCHAs
CAPTCHA is short for Completely Automated Public Turing test to tell Computers and Humans Apart. These are tests that verify whether a computing system is being operated by a human or a robot.
CAPTCHAs were built in such a way that they would need human mediation to be administered to computing systems as a part of the authentication system to ensure system security and hence prevention of unwanted looses for organizations.
Apart from summarizing how CAPTCHA works, this chapter also covers the following topics:
- Characteristics of CAPTCHAs
- Using artificial intelligence to crack CAPTCHAs
- Types of CAPTCHA
- Solving CAPTCHAs with neural networks
The following screenshot shows a CAPTCHA image that is used for verification: ...
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