> For the complete documentation index, see [llms.txt](https://xoops.gitbook.io/xmf-cookbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xoops.gitbook.io/xmf-cookbook/reference/key.md).

# Key

The `Xmf\Key` namespace contains classes to simplify working with keys. One use of these keys is in signing and verifying [JSON Web Token](/xmf-cookbook/reference/jwt.md).

## Classes in the Xmf\Key namespace

* [ArrayStorage](/xmf-cookbook/reference/key/arraystorage.md)
* [Basic](/xmf-cookbook/reference/key/basic.md)
* [FileStorage](/xmf-cookbook/reference/key/filestorage.md)
* [KeyAbstract](/xmf-cookbook/reference/key/keyabstract.md)
* [StorageInterface](/xmf-cookbook/reference/key/storageinterface.md)