While SMS codes and authenticator apps are popular options for two-factor authentication, they have some vulnerabilities and limitations. A more secure option is a security key—a physical device that approves the login with a quick tap. Here’s why you should get this device to protect your accounts.

5
Stronger Than Other 2FA Methods

To understand why a security key is a more secure alternative to traditional two-factor authentication (2FA) methods, you must understand how the key works through public key cryptography. When you register a security key with a service, the service stores a public key on its servers, while the private key is securely stored on your device.

When you log in, the service sends a challenge that can only be answered with the private key from your security key. In comparison, SMS-based 2FA is vulnerable to SIM swapping attacks. While app-based authentication is safer than SMS, it still requires manually entering codes that can be intercepted if your device is compromised or lost.

Security keys eliminate these risks, making them the best option for protecting your accounts from cybercriminals who constantly develop new ways to bypass 2FA methods.

4
Immune to Phishing Attacks

Traditional authentication methods often fall short when it comes to phishing attacks. You could be tricked into visiting a fake site that looks just like the real one, and without realizing it, enter your login details. If you’re using SMS or app-based 2FA, attackers can capture and use your code to access your account.

Security keys, on the other hand, make phishing virtually impossible. They use cryptographic verification between the key and the legitimate website or service. They only work when you’re on the legitimate website of the service where the key was initially registered. If you’re on a spoofed site, the key won’t work—no authentication happens.

So, while a security key removes the vulnerabilities tied to traditional methods, it also protects you if you accidentally end up on a phishing site or fake login page.

3
Log In to Your Accounts in a Flash

If you’ve used traditional two-factor authentication methods, you’re probably familiar with the frustration of waiting for an SMS code that, sometimes, never arrives, or trying to quickly enter a code from an authenticator app before it refreshes. Plus, there’s the challenge of remembering and entering that six-digit code correctly without risking getting locked out of your account.

In contrast, a security key simplifies the authentication process, allowing you to log in within seconds. You just insert or tap the key, which uses cryptographic communication with the service you’re logging into, and you’re granted access. There’s no waiting for codes to arrive or refresh, and no risk of being locked out for entering the wrong code.

Some platforms, like Microsoft and Google, now support passwordless logins using a security key, which is another strong reason to invest in one.

2
Protect Multiple Accounts With a Single Key

We commonly use multiple authentication apps or phone numbers for different accounts, and when that happens, managing separate 2FA apps, handling different codes even within one app, or receiving codes on multiple numbers can become a hassle. And if those apps or numbers are tied to other devices, you’ll need to carry those around.

A security key eliminates this issue, as you can register it with many services and platforms that support hardware-based 2FA. When it’s time to log in, you insert the key into your computer and get authenticated in seconds. This way, you don’t have to juggle multiple devices or deal with various authentication apps.

It also simplifies monitoring and gives you better control over which accounts are tied to your security key. You can also revoke access to specific accounts whenever necessary.

1
Works Without Phones, Networks, or Apps

The security key itself doesn’t rely on any network, battery, or authentication app, so you’re less likely to be locked out of your account simply because you don’t have your phone, it’s out of battery, you’re in an area with poor signal and can’t receive an SMS code, or the authentication app you’re using is acting up.

If you often travel to remote areas where you face these issues, using a security key for authentication can help eliminate these problems. The key works offline and is self-contained, but your device does need an internet connection to communicate with the service’s server and complete the authentication.

In short, as long as your device has internet access to connect to the service, you won’t have to worry about the issues mentioned above.

By now, you should clearly understand how a security key offers better protection than traditional authentication methods. You’d be better positioned to decide whether it’s worth purchasing one.

Remember that while other 2FA methods are free, a security key comes at a cost. However, the peace of mind and protection it offers make it well worth the investment.