  With the recent advances of IoT (Internet of Things) new and more robust
security frameworks are needed to detect and mitigate new forms of
cyber-attacks, which exploit complex and heterogeneity IoT networks, as well
as, the existence of many vulnerabilities in IoT devices. With the rise of
blockchain technologies service providers pay considerable attention to better
understand and adopt blockchain technologies in order to have better secure and
trusted systems for own organisations and their customers. The present paper
introduces a high level guide for the senior officials and decision makers in
the organisations and technology managers for blockchain security framework by
design principle for trust and adoption in IoT environments. The paper
discusses Cyber-Trust project blockchain technology development as a
representative case study for offered security framework. Security and privacy
by design approach is introduced as an important consideration in setting up
the framework.
