This report provides a detailed analysis of the European Union Agency for Network and Information Security (ENISA) Big Data security. It examines the ENISA Technology Landscape (ETL) and the associated threats, including eavesdropping, nefarious activity, unintentional data loss, organizational skill shortages, and legal issues. The report outlines the ENISA Big Data security infrastructure, including data sources, integration processes, storage, analytics, and presentation. It identifies key threat agents like cybercriminals, online social hackers, nation-states, employees, cyber terrorists, and script kiddies, and suggests measures to minimize their impact. The report also assesses trends in threat probability, focusing on high-probability threats such as denial-of-service, ransomware, phishing, and spam, as well as medium and low probability threats. Furthermore, the report recommends improvements in ETL processes, emphasizing the importance of encryption, advanced algorithms, and comprehensive security controls to enhance the overall security architecture. The analysis highlights the importance of training, administrative controls, and legal frameworks to mitigate risks and protect sensitive information within the ENISA framework.