What is the systematic methodology behind OSINT identity reconstruction — the "chain of linkage"?

The chain of linkage, or "Kette der Verlinkung," follows three escalating phases: geographic precision, contextual correlation, and identity fusion.

* The chain of linkage: three phases building a complete profile from public sources. *

Phase 1: Geographic precision through GEOINT. Tools like geospy.ai, EXIF data extraction, and reverse image search pinpoint physical locations from photos. Even without GPS metadata, background details like architecture, street signs, vegetation patterns, and even the angle of sunlight can identify locations. This phase answers the question: where was this person?

Phase 2: Contextual correlation. Cross-reference geographic findings with external data sources. Weather records confirm dates. Shadow analysis estimates time of day. University databases reveal enrollment. Exchange program schedules narrow down timeframes. Event calendars place someone at specific venues. Each new data point eliminates possibilities and narrows the identity space.

Phase 3: Identity fusion. The final phase combines everything into a complete profile. LinkedIn reveals real names and professional histories. Fitness apps like Strava and Komoot expose running routes that often start and end at home addresses. Instagram stories document daily activities in real time. Even Spotify playlists can reveal personality traits and current emotional states.

The result: a complete dataset containing name, address, daily schedule, workplace, social contacts, and behavioral patterns... all assembled from publicly available sources without a single password cracked or system compromised.