Building Local Knowledge Graphs for OSINT: Bypassing Rate Limits and Maintaining OPSEC
Recon Village @ DEF CON 33 • 8th, 9th and 10th August 2025
Abstract
Traditional OSINT collection faces two critical challenges: public APIs throttle queries to prevent abuse, and each query potentially reveals investigative interests to service providers. This talk presents a practical solution using Knowledge Graph technology combined with RDF (Resource Description Framework) to build queryable, offline OSINT repositories.
We demonstrate how to scrape multi-source OSINT data, transform it into RDF format, align it with common ontologies, and store it in local data packages. Once built, analysts can run complex SPARQL queries against their local triplestore without external dependencies or operational security concerns.
Speaker
DeciSym.AI, CEO & Founder
Dr. Pellegrino has over 20 years of research and development experience in information science. He has researched and built systems for the Pentagon, U.S. Department of Homeland Security, U.S. Army, U.S. Navy, DuPont, Dow Chemical, Pfizer, and smaller organizations. His work has received international awards in Visual Analytics and Data Integration. He is an expert in the fields of Natural Language Processing (NLP) and Linked Data, including ontology development. Work done for the U.S. Navy has included support for the CVN 78 and other platforms. In addition, he is a computer programmer and has led Software Engineering projects within large organizations.
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