A confidential number used as an authentication factor to verify a user's identity is called a:
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A. B. C. D.A.
PIN Stands for Personal Identification Number, as the name states it is a combination of numbers.
The following answers are incorrect: User IDThis is incorrect because a Userid is not required to be a number and a Userid is only used to establish identity not verify it.
Password.
This is incorrect because a password is not required to be a number, it could be any combination of characters.
Challenge.
This is incorrect because a challenge is not defined as a number, it could be anything.
The correct answer is A. PIN.
A PIN (Personal Identification Number) is a confidential number that is used as an authentication factor to verify a user's identity. It is a form of authentication that is commonly used in combination with other forms of authentication, such as a user ID and password.
A PIN is typically a numeric code that is four to six digits in length. It is used to authenticate the user when accessing a device, such as an ATM, mobile phone, or computer. The user enters the PIN, which is then compared to a stored value to determine if the user is authorized to access the device or application.
The PIN is considered a confidential piece of information, and users are advised to keep it secure and not share it with anyone. Additionally, systems and applications that use PINs as a form of authentication should ensure that the PINs are stored securely and not easily accessible to unauthorized individuals.
In contrast, a user ID is a unique identifier that is used to distinguish one user from another. A password is a secret word or phrase that is used to authenticate a user's identity. Finally, a challenge is a method of authentication that requires the user to prove their identity by responding to a specific request or question.