The Multistate Anti-Terrorism Information Exchange Program, also known by the acronym "MATRIX", was a federally funded data mining system originally developed for the Florida Department of Law Enforcement described as a tool to identify terrorist subjects.
The system was reported to analyze government and commercial databases to find associations between suspects or to discover locations of or completely new "suspects". The database and technologies used in the system were housed by Seisint, a Florida-based company since acquired by Lexis Nexis.
The Matrix program was shut down in June 2005 after federal funding was cut in the wake of public concerns over privacy and state surveillance.

Function

Computer Assisted Passenger PreScreening System II
Foreign Terrorist Tracking Task Force
USA PATRIOT Act
Terrorist Screening Center
Terrorist Threat Integration System
Total Information Awareness
Mass surveillance
Traffic Violations Reciprocity and Driver License Agreement