---
title: "Authentication Headers"
canonical: "https://docs.dk.is/space/DEV/10355387/Authentication%20Headers"
format: markdown
---
To communicate with the DK System using the webservice you need credentials or a token to get access to the data

When using the System to System licensing you have two options [BasicSecurity](https://dkdocs.atlassian.net/wiki/spaces/DEV/pages/10357653) or [Security](https://dkdocs.atlassian.net/wiki/spaces/DEV/pages/10355385)  
if the Usero System Licensing model is used then [dkAuth 1.0](https://dkdocs.atlassian.net/wiki/spaces/DEV/pages/10354695) ([TokenSecurity](https://dkdocs.atlassian.net/wiki/spaces/DEV/pages/10357665)) should be used but it can be used for System to System and is also recomennded for security reasons

> Macro (children)

## Related articles



> Macro (contentbylabel)


> Macro (details)
> 
> | **Related issues** |  |
> | --- | --- |