The near real-time control of 6G network services requires decision-making to be placed as close to network devices as possible. A possible solution is to deploy a distributed system with intelligent agents that relieves the classical centralized control plane from such near-real-time control loops. However, distributing decision-making entails new vulnerabilities that attackers can exploit. This paper presents the solution devised by the DESIRE6G project to secure such distributed intelligence and includes remote attestation to verify agents’ integrity, as well as secure communications, both supported by immutable transactions based on a blockchain system.