kubespray/docs/encrypting-secret-data-at-r...

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# Encrypting Secret Data at Rest
Before enabling Encrypting Secret Data at Rest, please read the following documentation carefully.
<https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/>
As you can see from the documentation above, 5 encryption providers are supported as of today (22.02.2022).
As default value for the provider we have chosen `secretbox`.
Alternatively you can use the values `identity`, `aesgcm`, `aescbc` or `kms`.
| Provider | Why we have decided against the value as default |
|----------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| identity | no encryption |
| aesgcm | Must be rotated every 200k writes |
| aescbc | Not recommended due to CBC's vulnerability to padding oracle attacks. |
| kms | Is the official recommended way, but assumes that a key management service independent of Kubernetes exists, we cannot assume this in all environments, so not a suitable default value. |
## Details about Secretbox
Secretbox uses [Poly1305](https://cr.yp.to/mac.html) as message-authentication code and [XSalsa20](https://www.xsalsa20.com/) as secret-key authenticated encryption and secret-key encryption.