TLS Protocol & Cipher Suite Inspection Tool

Analyze SSL/TLS handshake sequences, cipher suite negotiations, protocol versions (TLS 1.2/1.3), and forward secrecy parameters for secure web connections.

How to Use TLS Protocol & Cipher Suite Inspection Tool

  1. Input Hostname & Port: Enter a domain (e.g. google.com) and TLS port (default 443).
  2. Inspect Handshake Sequence: Observe ClientHello, ServerHello, TLS protocol negotiation (TLS 1.2 vs 1.3), and ALPN.
  3. Review Cipher Suite Security: Confirm perfect forward secrecy (ECDHE) and AEAD cipher support.

Frequently Asked Questions

What is Perfect Forward Secrecy (PFS)?

PFS ensures that session keys are negotiated ephemerally (via ECDHE). Even if a server's long-term private key is compromised in the future, past recorded sessions cannot be decrypted.