Very roughly, you strip the casing and then bend the fiber until a small amount of light begins escaping through the small gaps created by the bending. Most of

Very roughly, you strip the casing and then bend the fiber until a small amount of light begins escaping through the small gaps created by the bending. Most of the light continues to travel through the cable unharmed aside from a tiny decrease in intensity. Here is a page with some pictures of something along those lines: http://www.techrepublic.com/blog/security/protect-your-network-against-fiber-hacks/222 http://www.techrepublic.com/blog/security/protect-your-netwo... Here is an article about a US sub equipped for this kind of job: http://defensetech.org/2005/02/21/jimmy-carter-super-spy/ http://defensetech.org/2005/02/21/jimmy-carter-super-spy/