SecuriVPN by Advenica is a hardware-based quantum-secure network encryptor designed for tactical and strategic defense operations. It provides truly private communication within geographically scattered organizations or between temporary multi-organizations. SecuriVPN enables data to be sent and received across untrusted networks, preventing advanced attackers from reading or changing the data. It uses quantum-secure algorithms for data encryption and key exchange, ensuring long-term communication privacy. SecuriVPN offers vital network security functionalities such as authentication of information origin, integrity control, anti-replay mechanisms, and network architecture masking. It is certified for use within the EU up to the highest confidentiality level, SECRET UE/EU SECRET. The system is tailored for long-term communication privacy, protecting data with extended lifetime while safeguarding against interception, replay attacks, and manipulation. SecuriVPN also features silent mode reception, fast declassification to CCI, low power consumption for mobile mode, power outage resilience with key preservation, and distributed central management. It facilitates the administration of larger networks through key servers and remote administration, including remote configuration, network monitoring, and logging.