Free SSL/TLS Protocol Handshake

What is the Handshake?

Before any data is transmitted over HTTPS, the client and server must agree on how they will encrypt it. This process is called the TLS (Transport Layer Security) Handshake. They negotiate cipher suites, authenticate the server using its SSL certificate, and generate session keys.

Certificate Verification

During the handshake, the server sends its SSL certificate (containing its public key and domain identity, signed by a trusted Certificate Authority). The browser checks the certificate's validity dates, subject alternative names (SANs), and revocation status.

Local Decoding Benefits

System administrators diagnosing connection failures often need to inspect raw PEM certificates. Using a tool to decode ssl certificate local browser offline prevents potentially sensitive internal domain certificates from being logged by external validation services.