If your business already requires a code or approval after entering a password, you have taken an important step toward protecting your accounts. But not every form of multi-factor authentication, or MFA, protects you in the same way.
A text message, an authenticator app, and a security key can all help verify a sign-in. The difference is how each handles threats such as a stolen password, a fake login page, or an unexpected approval request. Before changing your whole setup, understand what you use now and where a stronger method would make the most difference.
Why SMS codes have limits
With SMS authentication, a service sends a code to your phone number. Someone who only knows your password should still need that code, which makes SMS MFA more useful than relying on a password alone.
However, a criminal can try to take control of your phone number through a SIM swap or fraudulent number transfer. A fake login page can also ask you for your password and texted code, then use them to sign in to the real service while the code is still valid.
That does not mean you should turn off SMS and leave an account without MFA. If SMS is the only method a service supports, use it while reviewing your options. For services that support stronger methods, especially your business email and administrator accounts, ask your IT provider about moving beyond text messages.
An authenticator app is not a single type of protection
An app may generate codes, send approval requests, or support passkeys. Installing an authenticator app does not tell you which method your business is using.
App-generated codes
These codes remove the need to receive a text message and avoid the risk of someone taking over your phone number to receive it. However, you can still be tricked into entering a valid code on a fake login page. Moving from SMS to app codes improves one part of your protection without removing that phishing risk.
Approval requests and number matching
With basic push approval, your phone asks whether to approve a sign-in. Repeated requests can pressure an employee into approving one just to make them stop.
Number matching adds a check: you enter the number shown during your sign-in into the approval prompt. It makes blind approvals harder, but it is still possible to be deceived during a fraudulent sign-in. Your employees should reject and report any request they did not initiate, even if it appears to come from a familiar app.
What makes passkeys and security keys different?
Compatible passkeys and FIDO2 security keys use a different approach. Instead of giving you a code to type into a website, they use a credential tied to the legitimate service. This helps prevent a look-alike login page from collecting something it can reuse to access your account.
These are examples of phishing-resistant authentication. Depending on the supported method, you may unlock a credential on your device with a fingerprint, face recognition, or PIN, or use a physical security key. A properly configured method can meet MFA requirements without asking you for a password followed by a separate code.
Passkeys can be stored and managed in different ways. Your provider should evaluate whether they are tied to a device or synchronized, how your business controls them, and what happens when someone leaves or loses access. Not every service or device supports the same options.
Phishing-resistant authentication is stronger protection against fake login sites, but it cannot protect you from every threat. A compromised computer, stolen signed-in session, or fraudulent payment request still needs other safeguards.
Choose a standard your business can manage
You do not need to let each employee choose a different method without oversight. Work with your IT provider to establish a preferred method and a small number of approved alternatives for genuine compatibility or accessibility needs.
Start with accounts where a compromise would cause the most damage: administrators, business email, finance, and access to sensitive customer information. Check what each platform supports, whether additional licensing or hardware is needed, and how employees will use it on their normal devices.
For Microsoft 365, your Microsoft 365 management should include reviewing authentication methods and the policies that require them. Having a stronger method available is different from requiring it for the accounts you intend to protect.
Plan recovery before removing older methods
Before enforcing a new requirement, enroll employees and test their normal workflows. Include remote staff, shared workstations, and anyone who cannot use a personal phone for business authentication.
Ask your provider to document:
- Lost-device recovery: How will you verify the employee’s identity and restore access?
- Approved backup methods: What can employees use if their normal device is unavailable?
- Old-method removal: Can someone still choose SMS or another weaker option and bypass the intended requirement?
- Emergency administrator access: How will authorized staff regain control if the normal sign-in process fails?
Emergency access should be carefully protected, documented, and monitored. It should not become an unprotected account kept around for convenience. Recovery procedures deserve the same attention as everyday sign-ins.
Make stronger MFA part of your ongoing IT management
Your authentication choices need to stay aligned with employee changes, new software, and the devices your business uses. They belong within your broader cybersecurity and IT management rather than ending with an app installation.
At Unified Technology Solutions, we help manage account security as part of our clients’ ongoing managed IT services. If you are looking for an IT provider to manage your business systems and help you choose stronger authentication, contact UTS to discuss stronger authentication for your business in Vero Beach or elsewhere on the Treasure Coast.