TLS Handshake Visualiser
Security
Overview
TLS negotiates parameters and establishes protected communication with authenticated endpoints. TLS 1.3 combines key agreement with certificate-based server authentication in common deployments. Trust checks include name, chain, validity and appropriate use. It protects data in transit, not an already compromised endpoint.
Protocol stages
- 1ClientHello
- 2ServerHello / key share
- 3Certificate validation
- 4Finished
- 5Protected application data
Interactive exercise
Knowledge check
The certificate is valid but issued for other.example, not the requested portal.example. Accept?
Educational model — not real hardware, traffic or official certification.