Your office mail server notifies you that your password has changed. Unchanged password? Changed password: why? Which computers and malware let attackers change passwords?

Does using several authentication methods at once have any drawbacks? Is there a way in which it helps to ensure that compromised accounts remain secure?

Imagine this: Your company's mail server sends you an email warning you that your password been changed. You haven't updated the password, however. Why? What changed the password? How did an attacker reset the password? What systems did the virus infect?

It's important to understand what challenge-response authentication is. A password-based approach is not as safe as this one.

Would it be considered an example of two-factor authentication if you have to enter two different passwords in order to log in to a system? Why?

Why does hashing a file that includes user passwords make more sense than encrypting the passwords in that file?

Invent a login management scenario. List all possible authentication methods. Passwords: obsolete soon?

Imagine the following: You get an email from the mail server of your firm informing you that the password you use has been updated. However, you haven't changed the password in quite some time. Why? What caused the password to be changed? How was it that the password was reset by the attacker? Which kinds of computers did the virus attack?

My understanding of multifactor authentication is limited. What purpose does it serve when it comes to avoiding password theft?

Invent a login management scenario. List all possible authentication methods. Passwords: obsolete soon?