HTTP (HyperText Transfer Protocol) and HTTPS (HyperText Transfer Protocol Secure) have the following main differences:
1. Security
- HTTP: Transmits in plaintext, data is unencrypted and vulnerable to man-in-the-middle attacks (such as eavesdropping, tampering, hijacking).
- HTTPS: Uses SSL/TLS encryption, ensuring that data is encrypted during transmission, enhancing security.
2. Port
- HTTP: Default port is 80.
- HTTPS: Default port is 443.
3. Data Encryption
- HTTP: No encryption, making data vulnerable to hijacking and tampering during transmission.
- HTTPS: Uses SSL/TLS encryption protocol, ensuring data’s confidentiality, integrity, and authentication.
4. Certificates
- HTTP: Does not require a certificate.
- HTTPS: Requires an SSL/TLS certificate, usually issued by a trusted CA (Certificate Authority).
5. SEO Impact
- HTTP: Search engines like Google lower rankings, especially for pages that input sensitive information (such as login and payment pages).
- HTTPS: Search engines prioritize indexing HTTPS sites, improving SEO rankings.
6. Performance
- HTTP: Generally faster due to no encryption overhead.
- HTTPS: Has a TLS handshake process, which may be slightly slower on first access, but TLS 1.3 optimizes performance and supports HTTP/2, which can speed up webpage loading.
7. Data Integrity
- HTTP: Data may be tampered with during transmission.
- HTTPS: Data integrity is better protected, preventing man-in-the-middle attacks.
8. Trustworthiness
- HTTP: Modern browsers (like Chrome and Firefox) mark HTTP sites as “not secure”.
- HTTPS: Displays a security lock 🔒, increasing user trust.
Conclusion
| Feature | HTTP | HTTPS |
|---|---|---|
| Security | Low (plaintext transmission) | High (encrypted) |
| Port | 80 | 443 |
| Encryption | ❌ No encryption | ✅ SSL/TLS encryption |
| Certificate | ❌ Not required | ✅ Requires CA certificate |
| SEO Impact | ❌ Negative impact | ✅ Improves ranking |
| Performance | Slightly faster | Initially slower, but supports HTTP/2 |
| Data Integrity | ❌ Prone to tampering | ✅ Protected |
| Browser Warning | 🚨 Displays “not secure” | 🔒 Displays security lock |
🔹 Recommendation: All websites, especially those involving user information (such as accounts, payments, etc.), should use HTTPS to ensure security and trustworthiness.
