Re: [PEN-TEST] OT - How secure is an ISDN line?

[John Brand <jbrand () ARL ARMY MIL>]

If I remember from my 30-odd years ago basic optics course, total internal
reflection operates by formation of an evanescent wave, a standing wave
which decays exponentially away from the dense medium.  That could be
tapped, as a lab demo, by a fiber needle or a spherical surface cozied up
to the reflecting interface, which allowed the evanescent wave to sort of
"detach" itself and propagate (leak) into the tapping dense medium.  You
didn't have to actually make contact.  If that holds for fiber guided
waves, might one tap the fibers that way?  It would weaken the transmitted
signal, but if care were taken perhaps not unduly.

Hardly worth a well deserved trip to the slammer to find out, though.

My 2 cents.  Sorry if I am all wet.  They say the memory goes first.  Hate
to think what might be next.

regards,
john b.