The crown jewels of an organisation are the digital properties and data that make an organisation unique. An example is the intellectual property or the self-developed software that enables an organisation to service its customers. Or the data that gives an organisation its competitive edge. Because this information is so valuable to a company, hackers try to get their hands on it and use it to blackmail an organisation. If the crown jewels fall into the hands of hackers or are no longer usable, the continued existence of an organisation is at risk. It is precisely these digital assets that must be identified, protected and backed up at all times. The monitoring of access is done with a network intrusion detection system.