DEMONS envisions building a novel cooperative network monitoring and mitigation system based on a completely decentralized, application-aware, privacy-preserving, multi-jurisdictional monitoring infrastructure. Such an infrastructure will provide the detection, reporting and mitigation mechanisms needed to combat not only today’s threats, but also those of tomorrow. DEMONS aims to realize this infrastructure by applying novel distributed systems technologies and leveraging their native scalability and fault tolerance characteristics. In doing this, DEMONS puts special emphasis on privacy, trust, and legal issues arising from collecting and exporting data across operator domains and across multiple jurisdictions.