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A Literature Review Of Captcha

I’m working on a computer science report and need support to help me understand better.

Write a literature review of CAPTCHA with details about the following

1. history of CAPTCHA and how it works (a page)

2. types of CAPTCHA and its difficulty and the latest developments (2 pages)

deliverables a report with a minimum of 3 pages not including the title and references pages and at least 5 credible sources and include in-text citation

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