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+---
+title: "Storage"
+description: "Storage Configuration"
+lead: "Configuring the SQL Storage."
+date: 2022-03-20T12:52:27+11:00
+draft: false
+images: []
+menu:
+  configuration:
+    parent: "storage"
+weight: 106100
+toc: true
+aliases:
+  - /docs/configuration/storage/
+---
+
+__Authelia__ supports multiple storage backends. The backend is used to store user preferences, 2FA device handles and
+secrets, authentication logs, etc...
+
+The available storage backends are listed in the table of contents below.
+
+## Configuration
+
+```yaml
+storage:
+  encryption_key: a_very_important_secret
+  local: {}
+  mysql: {}
+  postgres: {}
+```
+
+## Options
+
+### encryption_key
+
+{{< confkey type="string" required="yes" >}}
+
+The encryption key used to encrypt data in the database. We encrypt data by creating a sha256 checksum of the provided
+value, and use that to encrypt the data with the AES-GCM 256bit algorithm.
+
+The minimum length of this key is 20 characters, however we generally recommend above 64 characters.
+
+This secret must be generated by the administrator and can
+be done by following the
+[Generating a Random Alphanumeric String](../miscellaneous/guides.md#generating-a-random-alphanumeric-string)
+guide.
+
+See [securty measures](../../overview/security/measures.md#storage-security-measures) for more information.
+
+### postgres
+
+See [PostgreSQL](postgres.md).
+
+### local
+
+See [SQLite](sqlite.md).
+
+### mysql
+
+See [MySQL](mysql.md).