SSO vs MFA: A Detailed Comparison

SSO and MFA complement each other. SSO provides convenience, while MFA adds a strong layer of security. Organizations can use both SSO and MFA to create a secure and user-friendly environment for their users.
Identity & Access Management
 • 
October 11, 2024
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2 min read

What if I told you, you could reduce the risk of unauthorized access in your organization? Well, that’s what most SSO and MFA software applications promise. But the reality is that both have their benefits and drawbacks.

Single Sign-On (SSO) and Multi-Factor Authentication (MFA) are two fundamental security mechanisms used to manage user access to various systems and applications.

Both SSO and MFA play essential roles in improving user experience and safeguarding data. But they’re able to do this in two very different ways. Want to know which works better and which one to opt for? Well, read on.

What is Single Sign-On (SSO)?

Single Sign-On (SSO) is an authentication process that allows users to access multiple applications or services with a single set of login credentials. Once authenticated, users can switch between systems without needing to log in again.

What this does is help users avoid the redundant process where they need to keep logging in to every application one at a time. A good example of this would be when you log in to your Google account and are automatically logged in to Google Workspace, YouTube, and Google Drive.
What are Some of the Usual Features in SSO?

  • Streamlined Access: Users can log in once and gain access to multiple platforms.
  • Improved User Experience: Reduces the need to remember different credentials for various applications.
  • Centralized Authentication: A single system handles authentications for all connected services.

How Does SSO Work?

  • When you log in, SSO connects you to different apps that are linked. You only enter your username and password once.
  • After you’ve logged in, you can switch between those apps without having to log in again until you log out.

Pros of SSO:

  • It’s convenient: No need to remember multiple passwords.
  • It reduces password fatigue: You don’t need to type different passwords all day.
  • It’s faster to access various apps or websites.

Cons of SSO:

  • If someone hacks into your SSO login, they can access all your connected accounts.
  • Setting up SSO in larger systems can be a bit complicated.

What is Multi-Factor Authentication (MFA)?

Multi-factor authentication (MFA) is an authentication authentication tool that demands users to provide two or more characteristics of the system.

This adds an extra layer of security by combining something users know (password), something they have (security token), or something they are (biometrics).

What are Some of the Usual Features of MFA?

  • Enhanced Security: Adds additional layers of authentication to prevent unauthorized access.
  • Diverse Authentication Methods: These can include biometrics, OTPs (one-time passwords), hardware tokens, etc.
  • Risk-based Authentication: Some MFA systems work flexibly according to such risk indicators as the particular geographical area or the specific device.

How does MFA work?

  • After entering your password, MFA asks for another proof of identity (like a code or fingerprint).
  • You can only access your account after providing both pieces of information.

Pros of MFA:

  • It adds an extra layer of security: Even if someone steals your password, they still need that second piece of identification.
  • It’s effective against hacking attempts, especially password-based attacks.

Cons of MFA:

  • It takes extra time: Having to wait for a text or enter a code can be frustrating.
  • Not everyone has access to a second device, like a phone, for receiving codes.

What are the Key Differences Between SSO and MFA?

While both SSO and MFA are crucial for modern authentication, they serve distinct purposes and are often used together to provide both convenience and security.

Criteria Single Sign-On (SSO) Multi-Factor Authentication (MFA)
Primary Purpose Makes it easier by doing away with multiple branding Enhance security by insisting on multi-factor
User Experience Single sign-on for multiple applications Sometimes it can be a bit tiring particularly in instances where there are a couple of sub-steps.
Security Level Medium—if the initial login given to them is strong then they shall take little time. High—and that is because with the concept of multiple layers of authentication it is capable of offering stronger protection.
Use Cases Ideal for organizations that have numerous integrated applications. Recommended for cases where a high level of protection or security is required on the network.
Implementation Sometimes may be complex especially when managing diversity It would be simpler to achieve but would necessitate more infrastructure.
Risk The violation of a single login results in vulnerability throughout all hook-up systems. Additional factors are required even if one factor is either compromised or missing

What are Some Use Cases of Single Sign-On and Multi-Factor Authentication?

Single Sign-On (SSO) and Multi-Factor Authentication (MFA) are two important tools that help make our online lives easier and safer. SSO lets you log into many apps or websites using just one username and password.

For example, imagine you’re at an organization and you need to use several online tools, like Slack or your email. Instead of remembering different passwords for each app, SSO allows you to use the same login for all of them. This saves you time and makes things less confusing.

MFA, on the other hand, is like an extra layer of protection. After you log in with your password, MFA asks for something else, like a code sent to your phone, to make sure it’s really you.

This is super helpful for protecting accounts with important information, like your Wallet or bank account. Even if someone guesses your password, they can’t get in without the second step, which makes MFA a really strong security tool.

Together, SSO and MFA work as a great team. SSO makes logging in fast and easy, while MFA keeps your important stuff safe. For example, if your in workplace uses both, you can log in quickly with SSO and still be asked for a code or fingerprint when accessing something sensitive. This way, you get the best of both worlds—easy access and strong security.

  • SSO Use Case: In large organizations with multiple internal applications (e.g., HR systems, project management tools), SSO offers users seamless access without the hassle of multiple logins, while IT teams benefit from centralized user management.

  • MFA Use Case: Industries like banking and healthcare, where data protection is paramount, often rely on MFA to ensure that only authorized individuals can access sensitive systems, even if passwords are compromised.

SSO and MFA: A Combined Approach

In all honesty, SSO and MFA need to be deployed together to enhance both security and user experience. SSO simplifies access across systems, while MFA adds an extra layer of security, particularly for critical applications. By implementing both, organizations can enjoy the best of both worlds: ease of access and robust protection.

Choosing between SSO and MFA is not necessarily an either-or decision. While SSO enhances convenience, MFA bolsters security. For optimal protection, many organizations opt to implement both solutions, allowing users to benefit from streamlined access while ensuring that sensitive data remains secure.

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Judah Joel Waragia
Content Architect

Judah Joel Waragia specialize in crafting engaging and informative content on cybersecurity and identity management. With a passion for simplifying complex technical topics, Judah excels at creating content that resonates with both technical and non-technical audiences. His ability to distill complex ideas into clear and concise language makes him a valuable asset to the Infisign team.

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