# Write a Java auth module for Liberator

You can write your own auth modules for Liberator in Java. Usually you would implement such a module as a [Service blade](../deployment-framework/cdf-blade-types.md#service-blade). For a simple example of how to do this, see How can I... [Create a Java-based Liberator Permissioning Service blade](../deployment-framework/cdf-create-a-java-based-liberator-permissioning-service-blade.md).

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