What is the most costly and intrusive form of authentication?
A) Something the user knows such as a user ID and password
B) Something the user has such as a smart card or token
C) Something that is part of the user such as a fingerprint or voice signature
D) None of the above

Question

Quizplus · Accepted Answer

Something that is part of the user, such as a fingerprint or voice signature, is the most costly and intrusive form of authentication. This usually requires specialized hardware and software, as well as additional training for users. While it may provide a higher level of security, it also presents privacy concerns and can be more difficult to implement on a large scale compared to other forms of authentication.

What Is the Most Costly and Intrusive Form of Authentication