# Securing NATS

The NATS server provides several forms of security:

* Connections can be [*encrypted* with TLS](https://docs.nats.io/running-a-nats-service/configuration/securing_nats/tls)
* Client connections can require [*authentication*](https://docs.nats.io/running-a-nats-service/configuration/securing_nats/auth_intro)
* Clients can require [*authorization*](https://docs.nats.io/running-a-nats-service/configuration/securing_nats/authorization) for subjects they publish or subscribe to