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Security Beginner

What is Two-Factor Authentication (2FA)?

A security method requiring two different forms of identification before granting access to an account.

2FA combines something you know (password) with something you have (phone, hardware key) or something you are (biometrics). Even if a password is compromised, the second factor prevents unauthorized access.

Methods include TOTP apps (Google Authenticator, Authy), SMS codes (less secure due to SIM swapping), hardware keys (YubiKey), push notifications, and biometric factors. 2FA significantly reduces account compromise risk.

Related Terms

WAF (Web Application Firewall)
A security solution that filters and monitors HTTP traffic between a web application and the internet, blocking common attacks.
Vulnerability Scanning
Automated testing that identifies known security weaknesses in systems, applications, and network infrastructure.
Security Headers
HTTP response headers that instruct browsers to enable security features like XSS protection, framing prevention, and content type enforcement.
Webhook Signature Verification
A security mechanism that verifies webhook payloads are authentic and unmodified using cryptographic signatures.
SOC (Security Operations Center)
A centralized team and facility responsible for monitoring, detecting, analyzing, and responding to cybersecurity threats 24/7.
PKI (Public Key Infrastructure)
A framework of policies, hardware, and software for creating, managing, distributing, and revoking digital certificates.
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