Multi-Factor Authentication - What It Is & Why It Matters
We’ve talked a lot about the importance of changing your password and making sure you choose passwords that aren’t easily guessed. But while you...
Five Nines Team : Oct 9, 2024 8:00:00 AM
3 min read
Passwords alone are no longer enough to protect business data, because most breaches involve weak or stolen credentials. Multi‑factor authentication (MFA) adds an extra verification step that blocks many attacks, even when a password is compromised.
Cybercriminals increasingly target employee logins, and smaller organizations are least likely to use MFA despite being heavily at risk. Implementing MFA greatly improves your overall security posture and helps satisfy cyber insurance requirements.
MFA combines strong, unique passwords with an additional factor like a passkey, code, or app approval. Choosing the most secure method your users will actually adopt is one of the most effective security upgrades you can make.
Typing in a simple username and password is no longer enough to protect your data in the business technology world, which is why multi-factor authentication is such an important security measure. The cybercrime industry is after our most vulnerable information, and businesses are now forced to fight back with stronger cybersecurity practices.
According to the Verizon Data Breach Investigation Report, 81% of confirmed breaches involve weak, default, or stolen passwords. There are plenty of opportunities available for hackers to take advantage of as 38% of large organizations and 62% of SMBs do not use any form of multi-factor authentication at work.
According to Jumpcloud, the likelihood of MFA usage is about 78% for businesses with 1,001 to 10,000 employees – however, in smaller companies with 26 to 100 employees, the rate drops to 34%. In businesses with up to 25 workers, the adoption rate is only 27%.
Implementing multi-factor authentication is something that will benefit both your users and your organization's overall security.
Multi-factor authentication is a security method that adds an additional form of authentication to the login process on a given account.
While it is good to have a strong password, taking extra precautions is always recommended. When using multi-factor authentication, a user is only granted access to an account after completing extra steps to confirm their identity. For example, if you are trying to access your email, instead of only entering your email address and password for access, you may also receive a push notification on your mobile device to confirm that it's actually you. If the information doesn't match up, you don't receive access to the account.
If a hacker attempts to gain access to your account, you should receive a notification of some sort to complete the second step of logging in. If you are not attempting to access your account, and you are alerted by a notification, that is an immediate sign that someone could be trying to hack you. From there, you will have the ability to respond immediately by changing your passwords and contacting your IT provider.
As of just last year, 71% of all data stolen in basic cybersecurity attacks were credentials and those credentials were used in nearly one-quarter of the year's successful breaches. Add to that, 74% of breaches involved a "human element" or mistake, which directly or indirectly led to the compromise of credentials or other data.
Put simply, strong credentials do not necessarily equal unbeatable security, because human error is always at play.
Internal Training and other strong security practices can help defend against human error, but a layered approach should be taken. If credentials can be stolen, their successful reuse can be deterred with methods like MFA. Additionally, MFA is becoming a standard requirement in Cyber Insurance policies and can become a disqualifying factor for coverage if you aren't already using it.
Always choose the most secure MFA method available, options listed in order of security below:
Passkeys (sometimes referred to as FIDO2 tokens) are a passwordless login where you type in your username, use a PIN or biometric to unlock the Passkey, and press a button to log in. Passkeys can be stored in a password manager for use on multiple devices or tied only to a single device if you wish. Passkeys have built-in phishing resistance because the website's URL is stored with the credential, and if a threat actor tricks you into attempting to log into a similarly-named website, the Passkey will not be available for use. Passkeys are still very new, but are becoming more widely available. Most websites that currently support Passkeys will prompt you to switch to Passkeys and even walk you through the setup process.
Number matching is a phishing-resistant form of MFA where a set of numbers are shown on the website you logged into, and you have to type them in on your phone during login and press Approve to allow the login.
One-time passcodes are typically a 6-digit number that rotates automatically every 30-60 seconds. These codes are either generated by an authenticator app on your smartphone or from a security token shaped like a USB flash drive or a credit card (depending on your preference).
Push authentication is where users receive a notification on another device with an "approve" button as a way to confirm it is really them attempting to access their account. This method is vulnerable to "push fatigue" attacks, where a threat actor sends repeated push requests to your phone hoping that you'll get frustrated and approve it, or otherwise accidentally approve their login attempt.
Any multi-factor authentication that requires an SMS, email, or voice call with one-time codes should only be leveraged as a last resort. These methods are too easy to exploit, but better than not protecting your account at all.
Our security tip is to ensure your accounts are protected with complex, unique passwords, and the best multi-factor option you can reasonably use. There are plenty of multi-factor authentication platforms out there, so it's important to consult your IT team on an option that works best for your business. While you can make multi-factor authentication an optional security setting, many businesses decide to make this extra step required to ensure they are following the strongest security practices.
MFA is a security process that requires at least two different forms of verification before granting access to an account. Typically, this combines something you know (password) with something you have (phone, token, passkey) or something you are (biometric), so a stolen password by itself is not enough.
Even strong passwords can be phished, reused across sites, or exposed in data breaches, and most successful attacks still involve credential theft or misuse. MFA assumes that passwords will eventually be compromised and adds a second, independent barrier, drastically reducing the chances that stolen credentials lead to a breach.
If an attacker tries to log in with your stolen password, the system still prompts for the second factor — such as a push notification, passkey, or one‑time code. When you receive an unexpected prompt, it acts as an early warning so you can deny the attempt, change your password, and alert IT before damage is done.
Passkeys (FIDO2) and phishing‑resistant methods like number matching are currently among the strongest options. Authenticator‑app or hardware‑generated one‑time passcodes are also solid; push notifications are convenient but vulnerable to “push fatigue,” and SMS/email/voice codes should be treated as last‑resort options rather than your primary choice.
Start by enforcing MFA on your highest‑value systems (email, VPN, admin, finance, HR) and standardize on one or two strong methods that fit your users and devices. Provide clear training on what MFA prompts look like, how to respond to unexpected requests, and pair it with complex, unique passwords so MFA becomes a seamless, everyday part of your security culture.
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