Back in the day, when people used modems with a LED that blinked
when transmissions were occurring, someone aimed a telescope at
the LED and was able to intercept the modem's transmission since
the LED was operated from the output data stream. When people
started experimenting, data rates of up to 1 megabit/second were
achieved. Think about the possibilites for field day. :-)
73 Bill AE6JV
On 11/21/17 at 8:34 PM, [email protected] (Ron D'Eau Claire) wrote:
Fred, it's called LiFi and uses the ability of LED light
sources to handle high frequency modulation to send data
securely since one has to intercept the actual beam to even get
the data, much less decode the information. Apparently pretty
high data rates are possible with the system.
---------------------------------------------------------------------------
Bill Frantz |"Web security is like medicine - trying to
do good for
408-356-8506 |an evolved body of kludges" - Mark Miller
www.pwpconsult.com |
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