CAPTCHAs [319] are often used in an attempt to restrict access to humans (as opposed to automated processes). a. Give a real-world example where you were required to solve a CAPTCHA to gain access to...

CAPTCHAs [319] are often used in an attempt to restrict access to humans (as opposed to automated processes).

a. Give a real-world example where you were required to solve a CAPTCHA to gain access to some resource. What do you have to do to solve the CAPTCHA?

b. Discuss various technical methods that might be used to break the CAPTCHA you described in part a.

c. Outline a non-technical method that might be used to attack the CAPTCHA from part a.

d. How effective is the CAPTCHA in part a? How user-friendly is the CAPTCHA?

e. Why do you hate CAPTCHAs?