You are the chief cybersecurity officer at a multi-national corporation, which specializes in satellite- based communication systems. Recently, you transitioned to a more advanced system architecture

You are the chief cybersecurity officer at a multi-national corporation, which specializes in satellite- based communication systems. Recently, you transitioned to a more advanced system architecture that includes multiple ground stations globally. These stations synchronize and communicate via a central hub that manages the distribution of encrypted data across the network. Upon reviewing the quarterly network logs, you uncover a series of sophisticated intrusions. These intrusions are intermittently taking place inground stations located in three continents. Evidence suggests that these attacks are coordinated, aiming to map out the network's communication paths, likely in preparation for a much larger scale cyber-attack. Further investigation uncovers small pockets of malware within the system, specifically designed to circumvent your current security controls. Given the criticality of ensuring uninterrupted satellite communication, which countermeasure would be most effective in thwarting these intrusions, ensuring data integrity, and maintaining the operational status of your satellite communication systems?