I found this off a link from Schneier's newsletter. Can anybody
comment on this?
Udhay
http://www.physorg.com/news12093.html
For every burst of sound, there must exist a sound that bursts in
reverse, according to the theory of time reversal acoustics. From
their discoveries of some surprising characteristics of mediums and
frequencies, scientists have gained insight into acoustic time
reversal, which could impact applications such as sending
confidential messages in cryptography.
--
((Udhay Shankar N)) ((udhay @ pobox.com)) ((www.digeratus.com))
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