> For the complete documentation index, see [llms.txt](https://docs.encedo.com/hem-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.encedo.com/hem-api/reference/api-reference/authorization.md).

# Authorization

- [Initialisation](https://docs.encedo.com/hem-api/reference/api-reference/authorization/initialisation.md): Encedo HEM needs to be initialised before it's usable. This process is called Personalisation, and these two API endpoints are dedicated to this operation.
- [User authentication](https://docs.encedo.com/hem-api/reference/api-reference/authorization/user-authentication.md): Those endpoints allow to authenticate the User or Master based on passphrase.
- [External authenticator](https://docs.encedo.com/hem-api/reference/api-reference/authorization/external-authenticator.md)
- [Registration](https://docs.encedo.com/hem-api/reference/api-reference/authorization/external-authenticator/registration.md): Those endpoints allow to register a external authenticator, like Encedo Mobile Authenticator.
- [Authentication](https://docs.encedo.com/hem-api/reference/api-reference/authorization/external-authenticator/authentication.md): Those endpoints allow to authenticate based by External Authenticator.