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RESEARCHERS AT BEN-GURION University have devised a way to hide
information such as a fingerprint or a signature in color images which
could improve passport security or be used to create invisible product bar
codes or designs.
“The documents can be
faxed, scanned and reprinted without the hidden data disappearing,” New
Scientist magazine said on Wednesday.
Joseph
Rosen and a team of scientists created an algorithm that converts a
fingerprint or signature into a series of numbers which are used to shift
the dots that make up a color picture.
“Each
dot can be displaced slightly without noticeably altering the final
appearance of the image,” the magazine said. |
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GPS devices that
fight crime
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