• Articles
  • Tutorials
  • Interview Questions

What is Two-Factor Authentication (2FA)? Why You Need It

What is Two-Factor Authentication (2FA)? Why You Need It

This blog will cover everything about two-factor authentication, including its definition, types, examples, and implementation. We’ll also answer frequently discussed topics like how to enable or disable 2FA and how to turn off 2FA on Instagram. So, let’s get this party started!

Check out the video for the Ethical Hacking course.

What is Two-Factor Authentication (2FA)?

Two factor authentication(2FA), also known as Two Step verification (2 factor authentication), is a security process requiring users to provide two forms of identification to access their accounts or data. 2FA provides an extra security layer beyond the traditional username and password login. The two factors can be classified as follows:

  • Something you know, such as a password or PIN.
  • Something you have, such as a smartphone or authentication token.

2FA is a more secure way to protect sensitive information than a simple password. Even if a hacker manages to obtain your password, they would still need the second factor to access your account. This added layer of security makes it more difficult for hackers to access your personal or sensitive information.

Are you interested? Check out Intellipaat’s Ethical Hacking Training Certification Course and enroll now!

Types of Two-Factor Authentication

Types of Two-Factor Authentication

There are several types of 2FA available, each with its own benefits and drawbacks. Mentioned below are some of the most common types of 2FA:

  • SMS-Based 2FA – This involves receiving a one-time code via SMS on your registered phone number, which you then input into the login screen. This is one of the simplest and most widely used types of 2FA, but it can be vulnerable to SIM-swapping attacks.
  • Time-Based One-Time Password (TOTP) – This involves generating a unique code on your smartphone using an authenticator app like Google Authenticator or Authy. TOTP is more secure than SMS-based 2FA, but it can be inconvenient if your phone is lost or stolen.
  • Universal 2nd Factor (U2F) – In order to access your account, you need to insert a physical security key, like a YubiKey, into your device. Using U2F as a form of 2FA provides one of the highest levels of security, but purchasing it can be costly, and not all devices are compatible with it.
  • Biometric 2FA – Biometric 2FA involves using a biometric factor, such as fingerprint or facial recognition, to authenticate your identity. Biometric 2FA is convenient and secure, but all devices may not support it, and can be vulnerable to spoofing attacks.
  • Push Notification 2FA – This involves receiving a push notification on your registered mobile device, which prompts you to approve or deny the login attempt. This type of 2FA is convenient and secure, but it requires an internet connection and may not be supported by all apps or services.

Each type of 2FA has advantages and downsides, so choose the one that best meets your demands and security requirements. Some apps or services may provide numerous types of 2FA, allowing you to select the most convenient and secure option.

You may dramatically improve the security of your accounts and secure your personal and sensitive information by utilizing 2FA. It is critical to educate users on the benefits and drawbacks of each type of 2FA and to select the appropriate type according to the level of protection required for your accounts.

EPGC in Cyber Security and Ethical Hacking

Examples of Two-Factor Authentication

Examples of Two-Factor Authentication

There are many examples of 2FA in use today, including the following:

  • Google Authenticator – This well-known authenticator program creates TOTP codes for various apps and services, including Google accounts, Dropbox, and GitHub.
  • YubiKey – This is a physical security key that you may insert into a USB port or use wirelessly to verify your identity. YubiKey supports U2F and TOTP and is compatible with a variety of apps and services, including those from Google, Microsoft, and LastPass.
  • Duo Security – This service is a multi-factor authentication solution that supports a range of 2FA methods, including push notifications, SMS-based codes, and phone call verification. Duo Security collaborates with diverse applications and services, encompassing those offered by Microsoft, Cisco, and Amazon Web Services.
  • Apple Face ID – This biometric identification approach uses facial recognition to unlock your device or verify your identity for specific apps and services.
  • SMS-Based Codes – As a kind of 2FA, several apps and services provide SMS-based codes. When you log in, a text message with a code is delivered to your registered phone number, which you then enter into the login screen.

Go through these Ethical Hacking Interview Questions and Answers to excel in your interview.

How to Enable Two-Factor Authentication?

Enabling 2FA is a straightforward process that can be done in the security settings of the app or service you want to protect. Mentioned below are the general steps to enable 2FA:

  • Step 1 – Please access the security settings of the application or service you wish to safeguard. These settings are present within the account or profile settings section.
  • Step 2 – Search options for 2FA or authentication. There may be a label for this that says “Security,” “Privacy,” or “Login and Security.”
  • Step 3 – Choose the type of 2FA you want to use. Depending on the app or service, the options may include SMS-based, TOTP, U2F, or biometric 2FA.
  • Step 4 – Follow the on-screen instructions to set up 2FA. This may involve registering your phone number, installing an authenticator app, or setting up a physical security key.

It is important to follow the specific instructions the app or service provides to ensure that 2FA is properly set up. Once 2FA is enabled, you will be prompted to provide the second factor each time you log in to the app or service.

By enabling 2FA, you can significantly enhance the security of your account or data. Choosing the appropriate type of 2FA and educating users on its use and limitations is essential.

Get 100% Hike!

Master Most in Demand Skills Now !

How to Turn Off Two-Factor Authentication?

While 2FA is a great way to enhance security, there may be situations where you need to turn it off. Here are the general steps to turn off 2FA:

  • Go to the security settings of the app or service where you have enabled 2FA.
  • Look for 2FA or authentication settings.
  • Choose the option to turn off 2FA.
  • Follow the on-screen instructions to confirm the disabling of 2FA.

It is important to note that turning off 2FA will make your account less secure and should only be done if necessary.

How to Turn Off Two-Factor Authentication on Instagram?

The social networking site, Instagram, is popular among users who may share photographs and videos with their followers. If you’ve enabled 2FA on your Instagram account and wish to disable it, follow these steps:

  • Click and open the Instagram app on your mobile device.
  • From the top right corner of your profile page, tap the three horizontal lines.
  • Tap the three horizontal lines from the top right corner of your profile page.
  • Toggle off the switch next to Text Message or Authentication App, depending on which 2FA method you used.

Multi-Factor Authentication (MFA)

Multi-factor authentication (MFA) adds an extra layer of security to your online accounts by requiring two or more pieces of evidence to verify your identity. Some common factors include passwords, security tokens, and biometric scans. MFA reduces the risk of unauthorized access and fraud, and provides peace of mind. It’s a simple and effective way to protect your online accounts, and it’s offered by most major online services. Set it up today to keep your personal information safe.

If you are not already using MFA, I encourage you to set it up for your online accounts. It is a simple and effective way to protect your accounts and your personal information.


2FA is an important security technique that can significantly improve your online security. To gain access to your account or data, you must provide two forms of identity. Enabling 2FA is a straightforward operation that can be done in the security settings of the app or service that needs to be protected. By deploying 2FA, you can significantly lower the risk of cyber threats and data breaches compromising your personal and sensitive information.

For more information on ethical hacking, visit our Ethical Hacking Community

Course Schedule

Name Date Details
Cyber Security Course 25 May 2024(Sat-Sun) Weekend Batch
View Details
Cyber Security Course 01 Jun 2024(Sat-Sun) Weekend Batch
View Details
Cyber Security Course 08 Jun 2024(Sat-Sun) Weekend Batch
View Details