Multifactor authentication ensures that a user is who they say they are. The more factors are used to determine the identity of a person, the greater the reliability of the authenticity.
Typical MFA scenarios include:
1) Swiping a card and entering a PIN.
2) Logging into a website and being requested to enter an additional one-time password (OTP) that the website’s authentication server sends to the requester’s phone or email address.
3) Downloading a VPN client with a valid digital certificate and logging into the VPN before being granted access to a network.
4) Swiping a card, scanning a fingerprint and answering a security question.
5) Attaching a USB hardware token to a desktop that generates a one-time passcode and using the one-time passcode to log into a VPN client.
Something you know (The knowledge factor)
Accessing any account requires credentials by registering a unique username and password. Cellphone PINs and the answers to secret questions also fall under this category. Creating a strong password is still recommended.
Strong Password – Consisting of at least 8 characters that contain a combination of letters, numbers, and symbols if allowed. Case-sensitive letters along with passwords that do not contain words that can be found in a dictionary.
However, even strong passwords we use today lack credibility in the security world, thus introducing two-factor authentication (2FA) or multi-factor authentication (MFA).
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