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MRT144
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Seattle Washington
Oct 2002
time: 21:23
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how the f do you tap fiberoptics?
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Krill
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On a cold wet rock, in the middle of the Atlantic Ocean.
Dec 2003
time: 05:23
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It is impossible to tap a fibre optic cable. The light that is interpreted as data would refract out of the fibre optic cable, so the original destination of the light would stop recieving the light signal. You could interpret this in one of two ways: either the line has broken, and you aren't recieving the light, or some spliced in a cable, and you aren't receiveing the light.
Because the light never escapes the cable (because of total internal reflection) you haave to cut the cable. When you cut the cable, some (all of the light if it is a monomode cable) will escape from the cable. This would either scramble the message, as part of it is missing (ie the light has refracted out of the cable) for both the original destination and the eavesdropper. If you cut the cable to get the complete messaage, the origiinal destination gets nothing.
however, I think that it could be possible to cut the cable completely, and listen to the message, and at the same tme send the original message back along the remaining cable, as you know what the message is in binary code. In this way you could tap a fibre optic cable, but there would be a delay in the message, which may be picked up...
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VetLegion
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What Krill said. If someone knows how they tap into fiber optic lines, I'd like to hear it.
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19-02-2005 07:41
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