One of the reasons why there is a systemic risk is that the Danish banks and mortgage banks are closely interconnected via payment and settlement systems handling large values. Moreover, the financial institutions use the same data centres, network service providers, etc. Consequently, it is important that all key links in the chain are very strong.
Page 3 of 5  The Danish Financial Supervisory Authority and Danmarks Nationalbank have examined the cyber resilience of 15 of the largest and most important financial sector participants. Although a survey of this type is subject to certain caveats, our conclusion is that, overall, cyber resilience is at a reasonable level – but there is room for improvement.