A Reference Architecture for Management of Security Operations in Digital Service Chains.- Efficient flow monitoring in digital services.- Intelligent Transportation Systems -- models, challenges, security aspects.- NAD: Machine Learning based Component for Unknown Attack Detection in Network Traffic.- Detecting unknown attacks through system behavior analysis.- Signature-based detection of botnet DDoS attacks.- Automatic Attack Pattern Mining for Generating Actionable CTI Applying Alert Aggregation.- Blockchain-based task and information management in computational cloud systems.