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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.

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OWASP Top 10
A regularly updated list of the ten most critical web application security risks, published by the Open Web Application Security Project.
API Security
Practices and mechanisms for protecting APIs from unauthorized access, data breaches, and abuse.
WAF (Web Application Firewall)
A security solution that filters and monitors HTTP traffic between a web application and the internet, blocking common attacks.
Security Headers
HTTP response headers that instruct browsers to enable security features like XSS protection, framing prevention, and content type enforcement.
OAuth 2.0
An authorization framework that allows third-party applications to access user resources without sharing passwords.
Webhook Signature Verification
A security mechanism that verifies webhook payloads are authentic and unmodified using cryptographic signatures.
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