Captchas

CAPTCHA ,[object Object],[object Object],[object Object]

Contd… ,[object Object],[object Object],[object Object]

Origin ,[object Object],[object Object]

Contd… ,[object Object],[object Object]

Characteristics ,[object Object],[object Object],[object Object]

Accessibility ,[object Object],[object Object]

EZ-Gimpy ,[object Object],[object Object],[object Object],[object Object]

Generating CAPTCHAs :Bongo Answer: left

Sound Based CAPTCHAs:Eco ,[object Object],[object Object],[object Object]

Character Recognition ,[object Object],[object Object],[object Object],[object Object],[object Object]

Image-recognition CAPTCHAs ,[object Object],[object Object]

Principles ,[object Object],[object Object],[object Object],[object Object],[object Object]

CAPTCHA would look like… ,[object Object],[object Object],[object Object]

Applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Applications ,[object Object],[object Object],[object Object]

Applications ,[object Object],[object Object]

Applications ,[object Object],[object Object],[object Object],[object Object]

Conclusion ,[object Object],[object Object]

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