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Two Factor Authentication – Definition, Method, Steps, Forms, and More


What is Two Factor Authentication?

  • A Two Factor Authentication is a tool offered by several online service providers, which serves the purpose of adding a layer of security to the login process of your Internet accounts.
  • The mechanics are simple: when the user logs in to his online service account, this tool asks him to authenticate the ownership of his performance, providing two different factors.
  • The first of these is the password. The second can be several things, always depending on the service.
  • In the most common of cases, it is usually a code sent to a mobile phone via SMS or to an email account.
  • The fundamental essence of this tool comes down to the fact that you must “know something” and “own something” if you want to log into one of your accounts.


  • While two-factor authentication is not a foolproof method, it is an excellent barrier to preventing unwanted intrusion into your online accounts.
  • What is Knwoledge Management System (KMS): It is public knowledge that passwords have a double edge:
  • The weakest are easy to remember but very easy to deduce.
  • And the strong ones can be difficult to guess, but they are also challenging to remember.
  • Thus, many people, who are not already good at creating strong passwords, use the same password for all their accounts.
  • In this sense, two-factor authentication essentially achieves that an attacker has to decrypt the user’s password and access a second factor.
  • It is much more difficult to obtain, and that would involve either stealing a cell phone or compromising an email.

Best Secure System

  • Client Management System: If the two-factor authentication system is secure, then it is the best protection you can have in these cases.
  • There is a second benefit that this tool provides, and that is that it lets you know when someone has tried to enter your account without authorization.
  • If you receive a code to access your account on your mobile or in your email and you were not the one who tried to log in.
  • It is because someone has guessed your password and wants to enter your profile.
  • If this happens, you must change your password immediately.

In which accounts should you activate Two Factor Authentication?

  • The rule is simple. If the service you use offers a Two Factor Authentication tool and that account is valuable to you.
  • You should activate it.
  • In simple words, the priorities should be your online bank accounts, your email.

Are there other forms of two-factor authentication?

  • In addition to mentioned, there are tools as RSA’s Secure ID, a generator of chained codes and is typically using in the corporate sector.
  • Along with the previous ones, are the most used, although there are still more:
  • The Transaction Authentication Number (TAN) is an old form of two-factor authentication used in the past.
  • They were popular in Europe, and it was in the following way:
  • Your bank would send you a list of TAN’s and every time you had to make a money transaction, you had to enter one of these codes.
  • The ATM also works as a two-factor authentication tool, like something you must “know” -your PIN- and something you must “have” -your debit card.
  • Currently, many companies implement biometric technologies that serve the same functions.
  • Some systems require a personal password, scanning the fingerprints, the pupils, or even the users’ heartbeat.
  • On the other hand, wearable devices are catching on as well.
  • Some systems require that you wear a unique bracelet or some other accessory with a built-in chip.
  • Some scientific papers already speak of electromagnetic tattoos that could be helpful for these same purposes.
  • Google and Facebook have their applications to generate codes.
  • It allows users to create their unique access codes instead of receiving them by SMS or email.

Also Read: Apple Mini – Definition, Specifications, Ideal Choices, and Reviews

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