A staff member of the EU Delegation in a third country must manage a complex digital coordination operation involving multiple defense ministries of the Member States and the European Commission. The operation requires the exchange of sensitive security and defense data, as well as real-time collaboration with international partners. Based on the framework of the European External Action Service (EEAS) and the principles of international coordination of the EU, which of the following digital security and data governance strategies is most aligned with the mission of the EEAS and the security requirements of the Common Security and Defense Policy (CSDP)?