"We have come to expect from Hollywood films such as Enemy of the State
and the Jason Bourne trilogy that shadowy organizations have instant
access to all the databases we rely on and, with a few keystrokes, can
spy on our every movement. The process of collecting information from
multiple sources and merging it, known as data fusion, is supposed to
create an information resource that is more powerful, more flexible and
more accurate than any of the original sources. Proponents of data
fusion say that their systems let organizations make better use of the
data they already have; critics say that fusion threatens civil
liberties by using information in ways that were never envisioned when
it was first collected. Both sides assume that data-fusion systems
actually work. The reality is that the systems are nowhere nearly as
omniscient, as reliable or as well developed as many people think."
The article then goes into the opportunities and ethical challenges around the most common application of such fusion - profiling,
Scientific American
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