The document discusses using a security data lake built on a big data platform to improve cyber defense visibility and analytics capabilities. It notes that traditional SIEM tools have limitations in scalability and openness that can be addressed using Hadoop and related big data technologies. Examples are given of how security data lakes can optimize SIEM systems by enabling greater data volumes, processing power, and analytics flexibility in a more cost effective and deployment flexible manner. The presentation concludes by describing Softnix's security data lake product and its capabilities for data collection, enrichment, analysis, search, and visualization.