#### Encryption at Rest
* [alpha] Encrypt secrets stored in etcd. For more information, see [Securing a Cluster](https://kubernetes.io/docs/tasks/administer-cluster/securing-a-cluster/) and [Encrypting data at rest](https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/).

#### Node Authorization

      <match value="%PDF-1." type="string" offset="1:512"/>
      <match value="%PDF-2." type="string" offset="1:512"/>
    </magic>
    <glob pattern="*.pdf"/>
  </mime-type>
  <mime-type type="application/pgp-encrypted">
    <alias type="application/pgp"/>
    <magic>
      <match value="\x85" type="string" offset="0">
        <match value="\x03" type="string" offset="3"/>
      </match>
    </magic>

 - Encrypted data with DEK using AES-GCM instead of AES-CBC for kms data encryption. No user action required. Reads with AES-GCM and AES-CBC will continue to be allowed. ([#111119](https://github.com/kubernetes/kubernetes/pull/111119), [@aramase](https://github.com/aramase))...

* Change Azure ARM Rate limiting error message. ([#65292](https://github.com/kubernetes/kubernetes/pull/65292), [@wgliang](https://github.com/wgliang))
* AWS now checks for validity of ecryption key when creating encrypted volumes. Dynamic provisioning of encrypted volume may get slower due to these checks. ([#65223](https://github.com/kubernetes/kubernetes/pull/65223), [@jsafrane](https://github.com/jsafrane))

- Decoupled `TaintManager` from `NodeLifeCycleController` (KEP-3902). ([#119208](https://github.com/kubernetes/kubernetes/pull/119208), [@atosatto](https://github.com/atosatto))
- Enabled traces for KMSv2 encrypt/decrypt operations. ([#121095](https://github.com/kubernetes/kubernetes/pull/121095), [@aramase](https://github.com/aramase))

- Encryption of API Server at rest configuration now allows the use of wildcards in the list of resources.  For example, *.* can be used to encrypt all resources, including all current and future custom resources. ([#115149](https://github.com/kubernetes/kubernetes/pull/115149), [@nilekhc](https://github.com/nilekhc))

- In `kube-apiserver`, custom resources can now be specified in the `--encryption-provider-config` file and can be encrypted in etcd. ([#113015](https://github.com/kubernetes/kubernetes/pull/113015), [@ritazh](https://github.com/ritazh))

### SIG AWS

In v1.13 we worked on tighter integrations of Kubernetes API objects with AWS services. These include three out-of-tree alpha feature releases:

*   KMS: Alpha integration with GCP KMS was removed in favor of a future out-of-process extension point. Discontinue use of the GCP KMS integration and ensure [data has been decrypted](https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/#decrypting-all-data) (or reencrypted with a different provider) before upgrading ([#54759](https://github.com/kubernetes/kubernetes/pull/54759),[ @sakshamsharma](https://github.com/sakshamsharma))

### **CLI**

	polar Point                   // polar and Point denote different types
)

type TreeNode struct {
	left, right *TreeNode
	value any
}

type Block interface {
	BlockSize() int
	Encrypt(src, dst []byte)
	Decrypt(src, dst []byte)
}
</pre>

<p>
A defined type may have <a href="#Method_declarations">methods</a> associated with it.
It does not inherit any methods bound to the given type,