Cybersecurity is a vital area for cooperation between NATO and the EU. The two organizations have substantially improved their cybersecurity cooperation over the years, but issues related to information-sharing – particularly sharing classified information – continue to hinder their efforts. NATO and the EU lack official channels to share classified information, a result of distrust between the two organizations. In order to improve information-sharing, NATO and the EU ought to build trust by creating shared standards and practices for storing information – particularly by handling private information and using cloud computing – along with official channels to share classified information.