What is HTTPS?

An extension of HTTP that uses encryption to secure communication.

Detailed Explanation

HTTPS encrypts data transmitted between client and server using TLS (Transport Layer Security). This prevents eavesdropping, tampering, and man-in-the-middle attacks. Modern browsers show a padlock icon for HTTPS sites and mark HTTP sites as "Not Secure." HTTPS requires an SSL/TLS certificate issued by a trusted Certificate Authority.

Examples

  • Online banking always uses HTTPS
  • https://www.example.com uses port 443 by default
  • Browser shows padlock icon for secure HTTPS connections