Final answer:
Cloud services operating with EU citizens' data must comply with the GDPR, which ensures strict protections for personal data and privacy.
Step-by-step explanation:
A trusted cloud service that handles the data of EU citizens must adhere to the General Data Protection Regulation (GDPR). The GDPR is a widespread regulation within the European Union designed to protect individuals' privacy and personal data. It mandates that data about EU citizens can only be collected, processed, or stored under specific circumstances, with strict interpretations to ensure high protection for personal information. It governs the processing of personal data and imposes strict requirements on organizations that handle the data of EU citizens, regardless of where those organizations are located.