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Quick answer: Phishing-resistant MFA uses cryptographic methods, such as FIDO2 security keys and WebAuthn, to verify identity without any codes a user has to read or approve. For community banks, the highest-priority deployments are privileged access, remote access, and cloud-based platforms like Microsoft 365.
Most community banks already have some form of multi-factor authentication in place, and that’s a good start. The problem is that not all MFA is created equal, and attackers have gotten very good at working around the types most banks rely on today.
If you’re looking to strengthen your bank’s overall security posture, our cybersecurity solutions for community banks outline how a layered approach fits together. This post zooms in on one specific layer: phishing-resistant MFA and where it needs to go first.
What Is Phishing-Resistant MFA?
Standard MFA asks you to prove your identity with something you know (a password) plus something you have (a code sent to your phone, for example). Phishing-resistant MFA takes a different approach entirely. Instead of generating a code that a person has to read and enter, phishing-resistant MFA uses cryptographic key pairs to verify identity automatically, with no human-readable secret in the middle.
One of the most common methods is:
- FIDO2 and WebAuthn security keys: Physical devices that plug into a USB port or tap via NFC. The key proves identity through a cryptographic handshake that only works on the legitimate site, not a fake login page.
The defining characteristic: there is nothing for a user to read, copy, or approve. That removes the window attackers depend on. If you want a refresher on how two-factor and two-step authentication differ at a foundational level, this breakdown is a helpful starting point.
What Makes Standard MFA Phishable?
Think about the last time you logged into something and got a text with a six-digit code. That moment, right there, is the gap attackers exploit. Here is how each common MFA type holds up:
| MFA Type | How It Works | Key Vulnerability |
| SMS / voice codes | One-time code sent via text or call | SIM swapping, SS7 network exploitation, real-time phishing pages |
| App-based push approval (no number matching) | Approve or deny a push notification | Push bombing: attacker floods phone with requests until one gets accepted |
| One-time passwords / number-matching push | Code or number must match before approval | Real-time phishing pages can still capture and replay codes |
| FIDO2 / WebAuthn | Cryptographic handshake, no code involved | No human-readable secret to intercept |
The common thread across the first three rows: a human has to do something. Read a code. Approve a notification. Match a number. Every one of those actions creates a window. A convincing fake login page, a tired employee at the end of a long day, a barrage of approval requests at 2 a.m. These are all real scenarios attackers use to exploit that window.
Where Should Community Banks Deploy Phishing-Resistant MFA First?
Deploying phishing-resistant MFA across every bank system at once is rarely practical. The smarter approach is to prioritize by risk. Start where a breach would hurt the most.
1. Privileged and Administrative Access
Domain admins, core system administrators, and anyone with elevated network permissions are the highest-value targets. Compromising one of these accounts can give an attacker control over your entire environment. This group goes first, no exceptions.
2. Remote Access
VPN connections and remote desktop access into the bank network are frequent targets, especially as more staff work remotely part-time. These access points are exposed to the public internet and need strong protection.
3. Cloud-Based Services, Including Email
Microsoft 365 is one of the most commonly targeted platforms in the financial sector. Compromising a bank employee’s email account often gives an attacker visibility into communications, credentials, and internal workflows. Phishing-resistant MFA here closes a door that standard MFA leaves cracked open.
4. Third-Party Vendor Access
Vendor credentials are a well-documented soft spot. Attackers know that third-party accounts are sometimes set up quickly and not audited often. Any vendor accessing your network remotely should be subject to the same authentication standards as your own staff.
5. External Applications Hosting Nonpublic Information (NPI)
Any customer-facing or external system storing NPI outside the core network perimeter needs strong authentication. This includes loan origination platforms, document portals, and similar systems.
6. Internal Service Accounts
These accounts are often powerful, rarely logged into interactively, and easy to overlook during an MFA rollout. That combination makes them attractive to attackers who have already gained a foothold in the network.
7. Customer-Facing Access (ebanking, Remote Deposit Capture)
Protecting customer access to NPI is important, though the practical rollout depends on what your platform supports. Add this to your roadmap as infrastructure allows.
How to Roll Out Phishing-Resistant MFA Without Disrupting Operations
A thoughtful rollout matters as much as the technology itself. Here is a practical sequence to follow:
- Inventory everything. Document every system, account, and access point that currently uses MFA or should. You can’t protect what you haven’t mapped.
- Prioritize by risk. Use the list above as your guide. Privileged access first, then work outward.
- Pilot with IT and admin users. This group is both the highest risk and the most technically comfortable with new hardware or methods. Run the pilot here, work out the issues, then expand to the broader staff.
- Budget for hardware and plan for exceptions. Some legacy systems may not yet support phishing-resistant methods. Document those gaps and build a remediation timeline.
- Document everything. Your regulators will want to see that your MFA strategy is intentional and layered. Good documentation supports your exam posture as much as the controls themselves.
Let RESULTS Technology Help You Build the Right Plan
Knowing where to start is half the battle. The other half is having the right partner to help you assess your current gaps, prioritize your rollout, and implement controls that hold up under regulatory scrutiny.
RESULTS Technology works exclusively with community banks and financial institutions, so the guidance you get is built for your environment, not adapted from a generic enterprise playbook.
Schedule a consultation to talk through where your bank stands today.
Frequently Asked Questions
Can regular MFA still be phished?
Yes. SMS codes, app-based push approvals without number matching, and even one-time passwords can all be intercepted or manipulated by a determined attacker. Real-time phishing pages can capture and replay codes before they expire. Push bombing exploits user fatigue to get an accidental approval. Standard MFA is better than no MFA, but phishing-resistant MFA removes the human element that makes those attacks possible.
Where should a community bank deploy phishing-resistant MFA first?
Privileged and administrative accounts should be the priority, followed by remote access points like VPN, then cloud platforms like Microsoft 365, third-party vendor access, external systems holding NPI, and internal service accounts. Customer-facing systems like ebanking can be added to the roadmap as platform support allows.
Should every bank employee use phishing-resistant MFA?
The goal is to get there, but a risk-based rollout makes more practical sense for most community banks. Start with the accounts that carry the most risk if compromised, then expand. Trying to do everything at once often leads to implementation problems and user resistance that slow the whole effort down.
Can phishing-resistant MFA work with legacy banking systems?
Not always, and that is a real challenge for community banks. Some older platforms do not support FIDO2 or other phishing-resistant authentication methods. The right approach is to document those gaps, apply compensating controls where possible, and include legacy system upgrades in your longer-term security roadmap.
