latest Snowden docs show NSA intercepts all Google and Yahoo DC-to-DC traffic
mpetach at netflight.com
Fri Nov 1 01:26:46 UTC 2013
On Thu, Oct 31, 2013 at 5:53 PM, Jimmy Hess <mysidia at gmail.com> wrote:
> On Thu, Oct 31, 2013 at 7:24 PM, Matthew Petach <mpetach at netflight.com>wrote:
>> On Thu, Oct 31, 2013 at 7:02 AM, Ray Soucy <rps at maine.edu> wrote:
>> > Was the unplanned L3 DF maintenance that took place on Tuesday a frantic
>> > removal of taps? :-)
> No need for intrusive techniques such as direct taps:
> For shame.... you've sent in a link to some article behind a paywall,
> with some insane download fee.
> Which is an equivalent of hand-waving.
> They must be hiding their content, for fear that flaws be pointed out.
Oy...OK, let me find a document that spells it out
a bit more clearly for you.
> "Of all the techniques, the bent fiber tap is the most easily deployed with
>> minimal risk of damage or detection. The paper quantifies the bend loss
>> required to
>> tap a signal propagating in a single mode fiber"
> There will be some wavelengths of light, that may be on the cable, that
> bending won't get a useful signal from.
> Bending the cable sufficiently to break the total internal reflection
> property, and allow light to leak -- will generate power losses in the
> cable, that can be identified on an OTDR.
This patent covers a technique developed to do
non-intrusive optical tapping with a 0.5" microbend,
with only 0.5dB signal loss:
Most people aren't going to be able to tell a
0.5dB loss from a microbend tap from a splice
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