Cyber attacks on critical infrastructure, disinformation campaigns and cyber crime have become key challenges for states. The current hacker attack on a U.S. pipeline highlights the problem: According to the FBI, Russian criminals presumably encrypted the operator’s PCs and demanded several million U.S. dollars in ransom money – which significantly disrupted oil supplies in the United States. The incident shows the relevance of the issue for the international community. A recently published report by a UN group of experts attempts, among other things, to solve these problems by diplomatic means.