HTTP/HTTPS Security Protocols & Security Headers
Master TLS 1.3 encryption handshakes, HSTS preload headers, Content-Security-Policy (CSP), and CORS cross-origin policies.
Learning Objectives & TLS Handshakes
### Learning Objectives
- Understand Transport Layer Security (TLS 1.3) asymmetric key exchange and symmetric AES payload encryption.
- Configure critical HTTP defense headers: `Strict-Transport-Security` (HSTS), `Content-Security-Policy` (CSP), and `X-Frame-Options`.
- Enforce Cross-Origin Resource Sharing (CORS) origin restrictions cleanly.
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### HTTPS & TLS 1.3 Protocol
HTTPS encrypts HTTP traffic using TLS. During the initial TLS handshake, the client validates the server's X.509 digital certificate against trusted Certificate Authorities (CAs), performing Diffie-Hellman key exchange to establish encrypted symmetric session keys.
