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What is the full form of 2FA?

Full form of 2FA: Here, we are going to learn what does 2FA stands for? 2FA – which is an abbreviation of "Two-factor Authentication" in Computer Acronyms/Abbreviations, etc.
Submitted by Anushree Goswami, on March 22, 2020

2FA: Two-factor Authentication

2FA is an abbreviation of "Two-factor Authentication".

It is a system of the method used to enhance the level of security by adding up a further step or section to the user verification process. Fundamentally, it entails the user to go through two successful authentications sooner than access is approved or permitted. Each of the necessary methods of authentication is generally one in the given mentioned below:

  • Something the user already familiar with.
  • Something the user physically grasps.
  • Something indivisible from the user's body.

Examples of Two-factor Authentication

  • Whereas going through an ATM transaction, the user required to insert a bank card (something the user physically grasps) and enter a password (something the user already familiar with). These two aspects mutually make it tremendously implausible that an unofficial not permitted user is accessing the bank account.
  • Additional examples could be using a password and a fingerprint scan, or a password and a one-time password.

Online two-factor authentication

  • A lot of numerous online services use two-factor authentication by sending a text message to the user's phone with a single code that must be entered if the computer is not acknowledged.
  • This structure of two-factor authentication puts a stop to any person devoid of the phone from accessing an account and offers a major noteworthy enhancement to the level of security.
  • Several corporations may also use a Smartphone app, such as Google Authenticator, to generate arbitrary codes that can be used to authenticate the user devoid of sending a text message.


  • No further tokens are required for the reason that it uses mobile devices that are generally carried the entire time.
  • As the 2F authentication codes are continuously changed, passcodes that are generated with dynamism are safer to use than predetermined (static) log-in information.
  • Passcodes that have been used depending on the elucidation are automatically substituted to make sure that an applicable legitimate code is all the time obtainable; transmission/reception issues or difficulties do not for that reason put a stop to logins.


  • Users may still be vulnerable and prone to phishing attacks.
  • A mobile phone is not for all time obtainable - they can be missing, misplaced, stolen, have a dead battery, or otherwise not works.
  • Mobile phone reception is not always existing - huge areas, specifically situated out of towns, be deficient in reporting or exposure.

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