🔐 How HTTPS Works (Step-by-Step)
HTTPS = HTTP + TLS/SSL Security
It ensures secure communication between Client (Browser) and Server.
1️⃣ TCP Handshake (Connection Setup)
Before security, a reliable connection is needed:
Client → TCP SYN
Server → SYN + ACK
Client → ACK
✅ TCP connection established
2️⃣ Certificate Verification (Trust Building)
Client sends Client Hello
Server replies with:
Server Hello
SSL Certificate
Server Hello Done
🔍 Browser verifies:
Certificate Authority (CA)
Domain name
Expiry date
👉 Uses Asymmetric Encryption
Public Key (shared)
Private Key (server only)
3️⃣ Key Exchange (Security Setup)
Client generates a Session Key
Encrypts it...
24.01.2026 / 22:15
HTTPS = HTTP + TLS/SSL Security
It ensures secure communication between Client (Browser) and Server.
1️⃣ TCP Handshake (Connection Setup)
Before security, a reliable connection is needed:
Client → TCP SYN
Server → SYN + ACK
Client → ACK
✅ TCP connection established
2️⃣ Certificate Verification (Trust Building)
Client sends Client Hello
Server replies with:
Server Hello
SSL Certificate
Server Hello Done
🔍 Browser verifies:
Certificate Authority (CA)
Domain name
Expiry date
👉 Uses Asymmetric Encryption
Public Key (shared)
Private Key (server only)
3️⃣ Key Exchange (Security Setup)
Client generates a Session Key
Encrypts it...