A junior diplomat at the European External Action Service (EEAS) is tasked with drafting a secure communication protocol for a high-level mission in a conflict zone. The protocol must ensure that sensitive diplomatic data remains protected during transmission and storage, while adhering to EU standards for digital security and international cooperation. Based on the EU's approach to digital security and the coordination of international actions, which of the following measures best aligns with the EU's strategy for maintaining a rules-based global order and ensuring the safety of its digital infrastructure in external missions?