Techniques for protecting the contents of a computing device are provided. The techniques include associating security level information with each of a plurality of content items to be protected, the security level information including an integrity check action and a resultant behavior to be performed for each respective content item. The security level information can be built into an image comprising the content items to be protected and the image can be installed on a computing device. The techniques include accessing security level information associated with a content item responsive to a request to perform an action on the content, performing the integrity check action associated with the content item, and performing the resultant behavior associated with the content item responsive to the integrity check action indicating that the action requested cannot be performed.