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  {{< page-finder/list icon="/icons/cloud-hover.svg" text="YugabyteDB Aeon" url="/stable/yugabyte-cloud/cloud-secure-clusters/cloud-authentication/" >}}
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YugabyteDB Anywhere allows you to protect data in transit by using the following:

- Node-to-Node TLS to encrypt inter-node communication between YB-Master and YB-TServer nodes.
- Client-to-Node TLS to encrypt communication between a universe and clients. This includes applications, shells (ysqlsh, ycqlsh, psql, and so on), and other tools, using the YSQL and YCQL APIs.

## Manage certificates

YugabyteDB Anywhere supports the following certificates for encryption in transit:

- [Self-signed certificates created and managed by YugabyteDB Anywhere](auto-certificate/). YugabyteDB Anywhere can automatically create self-signed certificates and copy them to universe nodes.
- [Custom self-signed certificates](add-certificate-self/). Create and upload your own self-signed certificates for use with universes.
- [CA certificates](add-certificate-ca/). For on-premises universes, you can upload your own CA certificates. You must manually copy the certificates to universe nodes.
- [Hashicorp vault](add-certificate-hashicorp/).
- [Kubernetes cert-manager](add-certificate-kubernetes/). You can use cert-manager to manage certificates for Kubernetes universes.

## Rotate certificates

YugabyteDB Anywhere automatically alerts you 30 days before the expiry of any certificate. You can view the time to expiry of certificates by navigating to your universe **Health** tab.

You must rotate (refresh) TLS certificates before they expire to avoid service interruption.

{{<lead link="rotate-certificates/">}}
For information on rotating certificates, refer to [Rotate certificates](rotate-certificates/).
{{</lead>}}

## Enable encryption in transit

You enable Node-to-Node and Client-to-Node encryption in transit when you [create a universe](../../create-deployments/create-universe-multi-zone/).

You can also enable and disable encryption in transit for an existing universe as follows:

1. Navigate to your universe.
1. Click **Actions > More > Edit Security > Encryption in-Transit** to open the **Manage encryption in transit** dialog.
1. Enable or disable the **Enable encryption in transit for this Universe** option.
1. Click **Apply**.

### Enforce TLS versions

As TLS 1.0 and 1.1 are no longer accepted by PCI compliance, and considering significant vulnerabilities around these versions of the protocol, it is recommended that you migrate to TLS 1.2 or later versions.

You can set the TLS version for node-to-node and client-node communication. To enforce TLS 1.2, add the following flag for YB-TServer:

```shell
ssl_protocols = tls12
```

To enforce the minimum TLS version of 1.2, you need to specify all available subsequent versions for YB-TServer, as follows:

```shell
ssl_protocols = tls12,tls13
```

By default, PostgreSQL uses a default minimum version for TLS of v1.2, as set using the [ssl_min_protocol_version](https://www.postgresql.org/docs/15/runtime-config-connection.html#GUC-SSL-MIN-PROTOCOL-VERSION) configuration parameter.

As the `ssl_protocols` setting does not propagate to PostgreSQL, if you specify a different minimum TLS version for Master and TServer, you should update the `ssl_min_protocol_version` parameter. For example:

```sh
--ysql_pg_conf_csv="ssl_min_protocol_version='TLSv1.3'"
```

## Trust store

Add certificates to the YugabyteDB Anywhere Trust Store to validate connections from other services.

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See [Trust store](trust-store/)
{{</lead>}}

## Learn more

- [Securing YugabyteDB: Server-to-Server Encryption in Transit](https://www.yugabyte.com/blog/yugabytedb-server-to-server-encryption/)
- [Securing YugabyteDB: SQL Client-to-Server Encryption in Transit](https://www.yugabyte.com/blog/securing-yugabytedb-client-to-server-encryption/)
- [Securing YugabyteDB: CQL Client-to-Server Encryption in Transit](https://www.yugabyte.com/blog/securing-yugabytedb-part-3-cql-client-server-encryption-transit/)