23 lines
1.8 KiB
Markdown
23 lines
1.8 KiB
Markdown
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# Encrypting Secret Data at Rest
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Before enabling Encrypting Secret Data at Rest, please read the following documentation carefully.
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<https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/>
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As you can see from the documentation above, 5 encryption providers are supported as of today (22.02.2022).
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As default value for the provider we have chosen `secretbox`.
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Alternatively you can use the values `identity`, `aesgcm`, `aescbc` or `kms`.
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| Provider | Why we have decided against the value as default |
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|----------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| identity | no encryption |
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| aesgcm | Must be rotated every 200k writes |
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| aescbc | Not recommended due to CBC's vulnerability to padding oracle attacks. |
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| 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. |
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## Details about Secretbox
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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.
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