authelia/docs/configuration/storage/index.md

layout	title	parent	nav_order	has_children
default	Storage Backends	Configuration	14	true

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

storage:
  encryption_key: a_very_important_secret
  local: {}
  mysql: {}
  postgres: {}

Options

encryption_key

type: string {: .label .label-config .label-purple } required: yes {: .label .label-config .label-red }

The encryption key used to encrypt data in the database. It has a minimum length of 20 and must be provided. 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 encrypted data in the database is as follows:

• TOTP Secret

local

See SQLite.

mysql

See MySQL.

postgres

See PostgreSQL.