Transport Layer Security

HTTP headers

HTTP Strict Transport Security (HSTS)

Mechanism enabling web sites to declare themselves accessible only via secure connections and/or for users to be able to direct their user agent(s) to interact with given sites only over secure connections

Online Certificate Status Protocol (OCSP)

Protocol useful in determining the current status of a digital certificate without requiring [Certificate Revocation Lists (CRLs)]

Resources

Is TLS Fast Yet?

Yes, yes it is

Let’s Encrypt

Free, automated, and open Certificate Authority

moz://a SSL Configuration Generator

Builds configuration files to help you follow the Mozilla Server Side TLS configuration guidelines

Test

ObservatoryPythonCLI/Library/Web

Project designed to help developers, system administrators, and security professionals configure their sites safely and securely

Qualys SSL Labs SSL Server TestWeb

Performs a deep analysis of the configuration of any SSL web server on the public Internet

SSLyzePythonCLI/Library

Fast and powerful SSL/TLS server scanning library

testssl.shBashCLI

Testing TLS/SSL encryption anywhere on any port