HTTPS provides secure communication over HTTP using encryption and authentication, protecting the privacy and integrity of data exchanged between a client and server. It operates at the transport layer of the OSI model, using port 443 instead of the insecure port 80 for regular HTTP. The handshake process establishes a secure connection through public-private key encryption, digital certificates, and optionally symmetric encryption with a shared key.

1. Handshake with HTTPS
Fundamental concept of HTTPS
Presented by Rafiul Islam

2. Understand HTTP
• Hypertext Transfer Protocol
• World wide accepted protocol
• Use port 80
• Concern as unsecure
• OSI model layers

3. What is HTTPS
• Extension of HTTP
• Provide secure communication
• Use port 443
• Works at Transport layer
• OSI model layers

4. Why HTTPS
HTTPS provide a secure communication over HTTP
• Authentication of access
• Protection of privacy
• Integrity of exchanged data
• Bidirectional encryption

5. What’s the difference

6. HTTP works in HTTPS
OSI Model explanation

7. Burger Ordering
Burger Delivery

8. How it works
Retain digital certificate

9. How it works
Secure connection establishment handshaking

10. Private-Public Key
Public-Private key encryption-decryption

11. Shared Key
Shared key encryption decryption

12. FAQ
• Is HTTPS slower then HTTP?
• How about certificate?
• What is Mixed-Content?
• How to redirect HTTP to HTTPS?

13. Thank You