Why bother with authentication? evaluating and contrasting authentication systems

What is the purpose of authentication? Numerous verification strategies are being investigated for their merits and drawbacks.

Please elaborate so I may learn more about authentication challenge-response systems. A password-based system is not nearly as secure as the one shown here since users must remember their passwords.

Please elaborate so I may learn more about authentication challenge response systems. In contrast to what has been shown here, a system in which users are responsible for remembering passwords is very insecure.

What aims does the authentication procedure serve? Differentiate the benefits and drawbacks of different authentication techniques.

Explain authentication challenge–response. Why is it safer than a password-based system?

How does authentication serve a particular purpose? What are the benefits and drawbacks of various authentication methods?

An authentication challenge–response system may be described. Why is this approach more secure than a password-based method?

Outline the workings of a challenge-response authentication system. Differences between this method and the standard password-based system include

Explain the purpose of a "multifactor authentication" system. What degree of security does it provide in terms of guarding against password theft?