What is Two-Factor Authentication?

Two-factor authentication often referred to as two-step verification, is a security feature that defends your online versions by adding a layer of security. Instead of using a single factor to verify your identity, such as a password, it uses two, and a one-time password (OTP) sent to you via SMS or email.

Let’s take an example for better understanding. What are the requirements to log in to your email account?

  • Your email address
  • Your password

It is called one-step verification. All we have to do is arrive at the credentials and log in. But do you know how complicated this process can be? Anyone can get your email address, and hackers can access your account if your password is not strong enough. (If it’s “123456”, you’re in grave danger!)

How does 2FA Work?

2FA Work

Different 2FA methods use other processes but share an everyday standard workflow.

A 2FA transaction generally works like this:

  • The user enters their credentials for admission to the website or service.
  • An authentication server confirms the password, and also if correct, the user qualifies for the second factor.
  • The authentication server affixes a unique code to the user’s second-factor device.
  • By confirming the extra authentication, the user validates their identity.

While the underlying processes of multi-factor authentication are essentially the same from vendor to vendor, there are many ways to implement them, and not all approaches are created equal. Let’s look at the dissimilar types of 2FA.

Also Read: How to Erase Hidden Apps from Your iPhone?

Types of Two-Factor Authentication

Let’s take a look at popular websites and apps that are implementing 2FA these days.

  • Email-based 2FA
  • SMS-based 2FA
  • Voice-based 2FA
  • 2FA based on software token / TOTP
  • 2FA based on biometrics
  • As push notification
  • Hardware token-based 2FA

Different companies and services use the upstairs authentication types to provide their customers and users an extra layer of security.

Authentication Apps

Authenticator apps may be the best security option to protect our login procedure. However, not all authenticator apps can provide the most excellent security service. Only a few apps have been officially known for this service, and we’ve compiled a list for you. If you need to learn more about these apps and use them, find the details of each one below.

Google Authenticator

The most prevalent two-factor authentication program is Google Authenticator. It is an application to install on your mobile phone, giving you a real-time authentication code that changes every 30 seconds. Google suggests it for all your Google accounts. However, it can be used for a variety of other websites. The additional features include OS support, a dark theme, and offline support.

Google Authenticator includes various features such as:

  • TOTP and HOT Algorithms
  • You don’t know the essential an internet connection to use it

It is free, clean, functional, and has a large user base. Ultimately, you will be able to add numerous accounts to this app. Download from here for Android and iOS.

Microsoft Authenticator

Microsoft Authenticator, a trusted authentication tool created by Microsoft Corporation, can provide the most excellent 2FA security. It is the most suitable option since it allows for safety and comfort. Microsoft Authenticator ensures strict security by verifying the validity of your device and network and delivering TOTP.

Also, the app’s beautiful and well-designed user interface makes it easier to use. You can download this app for Android and iOS from here.


2FA Authenticator (2FAS) is an excellent choice if you want intelligent authentication software. For six-digit TOTP authentication, this is a fantastic app. This app offers features like QR Code-based authentication and others that make login easier and more secure. It lets you avoid the problem of inadvertent incorrect input ultimately and saves time. This robust authentication tool is also compatible with over 500 social and other websites.