Benefits and Importance
Multifactor authentication (MFA) is a valuable security measure for individuals and organizations alike due to its numerous benefits. MFA provides an additional layer of security beyond a simple password, requiring users to provide a second factor of authentication to access their accounts. This extra step makes it more difficult for attackers to gain unauthorized access to accounts, as they would need both the password and access to the second factor.
Types of Authentication Factors
MFA combines two or more of the following factor types, so that a compromised password alone isn't enough to get in:
- Something you know: a password, PIN, or security question.
- Something you have: an authenticator app code, a hardware security key, or a one-time SMS code.
- Something you are: a fingerprint, face scan, or other biometric.
Not all second factors offer the same level of protection. App-based authenticators and hardware security keys are significantly more resistant to interception than SMS codes, which can be vulnerable to SIM-swapping attacks. Where possible, organizations should favor app-based or hardware MFA over SMS.
How MFA Reduces Risk
MFA can also reduce the risk of identity theft by requiring users to provide two separate forms of identification, which makes it more difficult for an attacker to impersonate the user. MFA can also protect against common attacks such as phishing, social engineering, and brute force attacks, as well as provide real-time alerts when suspicious login attempts are made.
Compliance and Trust
MFA is also often a regulatory requirement in industries dealing with sensitive information, ensuring compliance with data privacy and security regulations. Furthermore, MFA can increase user trust and confidence in a system or service, particularly when it comes to protecting their sensitive information.
The Real-World Impact
Microsoft has reported that MFA blocks more than 99% of account compromise attacks, since the vast majority of credential-based attacks rely on a stolen or guessed password being the only thing standing between an attacker and an account. That single statistic is why MFA is consistently rated one of the highest-impact, lowest-cost security controls an organization can put in place - it is also one of the controls highlighted in our Comprehensive Guide to Cyber Attacks as a defense against password and brute force attacks.
Getting Started With MFA
Most organizations roll out MFA in stages: starting with privileged and administrator accounts, then expanding to all users, and pairing it with conditional access policies so MFA prompts are enforced intelligently based on risk signals like location or device. Aligning your rollout with frameworks such as the NIST Cybersecurity Guidelines can also help ensure your implementation meets compliance requirements from the start.
Overall, MFA provides an additional layer of security and protection for users' accounts, reducing the risk of unauthorized access and identity theft, and making it an essential security measure in today's digital age.
Ready to roll out MFA across your organization? Our Microsoft 365 Services team can help you implement and manage MFA and conditional access policies tailored to your environment.