A simple username and password combination is not enough to protect your online accounts against data breaches, phishing, brute-force attacks, and even AI-backed automated intrusions. In response to rising cyber threats, many online companies and services have implemented tools like two-factor or multi-factor authentication (2FA/MFA) and passwordless authentication. These features make it more difficult to compromise an account.
You can verify yourself using a physical security key. Even if a cybercriminal has obtained your username and password or compromised your mobile device, they won't be able to access your data without the key. Security keys are affordable and user-friendly, prevent phishing attacks, and are significantly more secure than SMS-based two-factor authentication. If you are considered more at-risk than the average user, some service providers will require you to purchase one. They can be complicated to set up, unfortunately, but the improvement in your personal security can be worth it.
Also: The best home security systems, from DIY to pro installation
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What is the best security key right now?
Our favorite security key is the Yubico YubiKey 5C NFC. It offers excellent security and convenience, making it a worthwhile investment for anyone looking to safeguard their online accounts. This $55 key is compatible with a vast array of protocols and can be configured to provide easy authentication on mobile.
ZDNET has tested many security keys and frequently tracks market developments. Many of us use security keys ourselves and lean upon our personal experience, customer feedback, and extensive research to shape our recommendations.
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Best security keys of 2025
Show less View now at Amazon The YubiKey 5C NFC combines USB-C connectivity with the versatility of wireless NFC, enabling broad compatibility with a wide range of devices -- making it our top choice for most users. Why we like it: It is FIDO-certified, which allows it to work with Google Chrome and any FIDO-compliant application on Windows, macOS, or Linux. In addition, the use of NFC and the Yubico Authenticator app makes it compatible with mobile devices, giving you the option to authenticate quickly via your smartphone or tablet. Tap and go, and you're done. The YubiKey USB authenticator has multi-protocol support, including FIDO2, FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, smart card (PIV), OpenPGP, and challenge-response capabilities, providing solid hardware-based authentication. Considering it is dust, water, and tamper-proof, this key is a great all-rounder for your security needs. Who it's for: I consider this security key the best option for most users to improve their privacy and security. Customer feedback indicates that this popular key's NFC functions are convenient, especially for mobile use, and it is an excellent option for two-factor authentication. Who should look elsewhere: Each key costs $55, which may sway your decision, as you should consider investing in two to ensure you have a backup available if you lose your first key. Yubico YubiKey 5C NFC features: USB-C and NFC compatibility | WebAuthn | Compact design | No battery required | Water, dust, and tamper-resistant | FIDO certified | Multi-protocol support | Passwordless authentication Pros Broad versatility
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