Space infrastructure has become an integral part of everyday life, with individuals, businesses, and governments relying overwhelmingly on it. Given its strategic importance, space systems are increasingly becoming the target of cyberattacks. Block Armour has developed a next-gen Zero Trust Cybersecurity solution to secure satellite systems, integrated ground stations, and all communication networks. The solutions harness digital signatures to identify, authenticate and authorize devices, thereby securing Space Infrastructure and networks against emerging cyber threats.