What Is HTTPS?
HTTPS Protocol
HTTPS (HTTP Secure) is HTTP encrypted with TLS. It ensures that data between your browser and the server is encrypted, authenticated, and tamper-proof. Every website should use HTTPS — browsers mark HTTP sites as 'Not Secure,' and Google ranks HTTPS sites higher.
How HTTPS Works
Without HTTPS: anyone on the network (coffee shop Wi-Fi, ISP, government) can read your passwords, credit cards, and personal data in transit. With HTTPS: the data is encrypted — interceptors see only unreadable ciphertext. Let's Encrypt provides free TLS certificates.
Key Concepts
- Encryption — All data between browser and server is encrypted — prevents eavesdropping
- Authentication — The server proves its identity via TLS certificate — prevents impersonation
- HSTS — HTTP Strict Transport Security — tells browsers to always use HTTPS, preventing downgrade attacks
Frequently Asked Questions
Is HTTPS mandatory?
Practically yes. Browsers flag HTTP as insecure, Google penalizes HTTP in rankings, and features like geolocation, service workers, and WebAuthn require HTTPS.