How to Use the SSL/TLS Handshake Step-by-Step Simulator
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1
Toggle between TLS 1.2 (Classic 2-RTT Handshake) and TLS 1.3 (Modern 1-RTT Handshake).
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2
Adjust simulated round-trip network latency (e.g. 20ms local, 150ms trans-Atlantic).
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3
Step through each message: ClientHello, ServerHello, Certificate, KeyExchange, and EncryptedExtensions.
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4
Inspect the cryptographic keys exchanged at each stage and compare total connection establishment time.
Practical Example & Use Case
Common Real-World Scenario
Demonstrating how upgrading from TLS 1.2 to TLS 1.3 cuts connection latency in half on high-latency mobile networks.
Technical Notes & Limitations
Browser Engine Architecture
Educational simulation adhering to RFC 5246 (TLS 1.2) and RFC 8446 (TLS 1.3) specifications.
Frequently Asked Questions
Why is TLS 1.3 faster than TLS 1.2?
TLS 1.3 combines key exchange into the very first ClientHello/ServerHello message pair, completing the handshake in 1 RTT instead of 2 RTT.