top of page
Nico Dekens
Blog
Search


When the Source Attacks Back: Prompt Injection Is Coming for OSINT
AI can help investigators move faster. It can also be manipulated by the sources it reads. This practical guide shows how prompt injection enters OSINT workflows, how to detect hidden instructions in webpages, PDFs and spreadsheets, and how to preserve, test and report the evidence. Includes a hands-on CTF lab with three realistic files to investigate.

Nico Dekens | dutch_osintguy
Aug 3122 min read


The Amsterdam Street That Never Existed
AI can generate a convincing Amsterdam street that never existed, then fail to recognize its own fiction when asked to geolocate it. This experiment shows why visual plausibility is no longer proof. For OSINT practitioners, the lesson is clear: seeing is not believing. Only provenance, source tracing, corroboration, and disciplined geolocation tradecraft can separate synthetic evidence, from reality in an internet where images can lie with confidence and false places can feel

Nico Dekens | dutch_osintguy
Jun 814 min read


Evidence Poisoning: The OSINT Crisis Nobody Is Ready For
Evidence poisoning is the contamination of the open web with synthetic, manipulated or amplified material that later appears useful as investigative evidence. In an age of AI slop, fake personas, recycled footage and algorithmic summaries, OSINT practitioners must ask not only whether a source can be found, but whether it was manufactured to be found.

Nico Dekens | dutch_osintguy
May 927 min read
bottom of page