Abstract - This paper presents an in-depth description of a multi-modal security solution based on a blockchain architecture developed within the CHRISS (Critical infrastructure High accuracy and Robustness increase Integrated Synchronization Solutions) project. Specifically, the focus in the paper is on the description of the proposed security architecture, functionalities and security measures based on modern blockchain solutions developed for the CHRISS project.

The paper presents an overview of Call Detail Records (CDRs), important datasets within the telecommunications industry that capture detailed information about telephonic activities. CDRs encompass a vast array of metadata, including the date, time, duration, source, destination of calls, and more specific details like service type, call status, and location data. This paper highlights the significant potential of CDRs in various applications, ranging from telecom fraud detection, urban planning, disaster readiness, to novel methodologies for predicting socio-economic metrics like poverty. We discuss specific use cases, demonstrating the critical role of CDRs in identifying SIM box fraud, analyzing urban mobility, and enhancing emergency response strategies through sophisticated data analysis techniques. Furthermore, we introduce a novel CDR Generator solution developed within the RITHMS project (G.A. 101073932) aimed at detecting suspicious activities around archaeological sites. The tool leverages modern technologies such as Python, Streamlit, and Folium, to generate synthetic CDRs based on selected geographic areas, demonstrating the applicability of CDRs in safeguarding cultural heritage. We find that the generated dataset largely preserves the properties of the real dataset, thus being of real use for the research community suffering from the limited availability of datasets from either practical simulations or experimental testbeds that can be considered as reference or standard datasets

In the current industrial century, smart grid is one of the technologies that has been proposed for efficient and quality distribution of electricity. However, this technology is exposed to many security threats and vulnerabilities. These challenges have led to the development of advanced technologies and sustainable solutions to make smart grids more secure and reliable. Blockchain is one of the recent technologies that has attracted a lot of attention in various applications, including smart grids. SealedGRID is a project designed, analyzed and implemented with the aim of providing a scalable and reliable Smart Grid security platform based on blockchain. In this paper, we present a scalable and secure solution for smart grids using Hyperledger Fabric and MQTT.