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Re: Using lasers to communicate



> If you have a secure link you don't need encryption.  Arguably, the
> converse is true; if you have secure encryption you don't need
> a secure link.  Isn't the ability to transmit secure data over
> insecure channels one of the primary justifications for encryption?
> 

Of course.  My point, though I seem to have failed to state it,
is that encryption is a cheap software thing while laser beams
are expensive, complicated, and still not secure.