# SSL/TLS Strong Encryption

The Apache HTTP Server module mod_ssl provides an interface to the OpenSSL library, which provides Strong Encryption using the Secure Sockets Layer and Transport Layer Security protocols. The module and this documentation are based on Ralf S. Engelschall's mod_ssl project.

- Introduction
- Compatibility
- How-To
- Frequently Asked Questions
- Glossary

Extensive documentation on the directives and environment variables provided by this module is provided in the mod_ssl reference documentation.