A security key is a hardware authentication device used to prove identity through cryptographic operations rather than reusable shared secrets. It matters because hardware-backed factors can resist phishing and replay much better than many code-based methods.
What is Security Key?
Security keys are commonly used with modern standards such as FIDO2 and WebAuthn. They store cryptographic credentials and require the user to present the physical device during sign-in, making them a strong choice for privileged and high-risk access.
What Security Key Commonly Supports
Common uses include phishing-resistant MFA, privileged access, passwordless authentication, account recovery hardening, and high-assurance enterprise login.
Security Key vs. SMS OTP
SMS OTP relies on phone-number access and typed codes. Security keys use cryptographic proof tied to a physical device and are usually much harder to phish.
Frequently Asked Questions
Why are security keys important?
Because they provide one of the strongest practical defenses against phishing-based account compromise.
Are security keys only for admins?
No. They are especially valuable for admins, but many organizations now use them more broadly.
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