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Security Intermediate

What is Security Headers?

HTTP response headers that instruct browsers to enable security features like XSS protection, framing prevention, and content type enforcement.

Essential security headers include Content-Security-Policy (control resource loading), X-Frame-Options (prevent clickjacking), X-Content-Type-Options: nosniff (prevent MIME sniffing), Strict-Transport-Security (force HTTPS), and Referrer-Policy (control referrer information).

Additional headers include Permissions-Policy (restrict browser features), X-XSS-Protection (legacy XSS filter), and Cross-Origin headers (CORP, COEP, COOP). Security headers are a crucial defense layer that requires no code changes โ€” just server configuration.

Related Terms

OWASP Top 10
A regularly updated list of the ten most critical web application security risks, published by the Open Web Application Security Project.
SIEM (Security Information and Event Management)
A platform that collects, correlates, and analyzes security events from across an organization to detect threats and incidents.
Cryptographic Key Management
The practices and procedures for generating, storing, distributing, rotating, and revoking encryption keys securely.
Webhook Signature Verification
A security mechanism that verifies webhook payloads are authentic and unmodified using cryptographic signatures.
Vulnerability Scanning
Automated testing that identifies known security weaknesses in systems, applications, and network infrastructure.
SQL Injection
An attack where malicious SQL code is inserted into application queries through user input to access or manipulate the database.
View All Security Terms โ†’