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Secret Messages Come in .Wavs

http://www.wired.com/news/print/0,1294,41861,00.html

Secret Messages Come in .Wavs

by Declan McCullagh

2:00 a.m. Feb. 20, 2001 PST

FAIRFAX, Virginia -- Neil Johnson has a job that's nothing if not unusual: He investigates how to uncover concealed messages embedded in sound and video files.

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