# ssl v11.6 - API Reference

## Modules

- [ssl](ssl.md): Interface functions for TLS (Transport Layer Security)
and DTLS (Datagram Transport Layer Security).
- [ssl_crl_cache](ssl_crl_cache.md): CRL cache
- [ssl_crl_cache_api](ssl_crl_cache_api.md): API for a TLS CRL (Certificate Revocation List) cache.
- [ssl_session_cache_api](ssl_session_cache_api.md): TLS session cache API