notable
>>8146050 China disinfects BANK NOTES and quarantines them for 14 days
Remember the enormous stash of US $1 currency from China that was confiscated?
>If you can't see the can on the other end of the string, the comm is vulnerable.
Not good enough. No, even seeing the other end of the string is totally inadequate protection. Cables leak signals. Electric wiring in your residence is a big antenna that picks up signals inside your place. Windows and walls and plastic potatochip bags vibrate with tiny vibrations that can be picked up by laser inferometers a mile away, allowing excellent transcription of audio.
Etc etc etc.
'member this post? Amazing what can be done with complex digital signal analyzers these days. What if they put the spread-spectrum time-domain spectrometry capability on a polar-orbiting satellite? Just thinking out loud here.
### Below is all PB ###
>>8062909 at 2020-02-07 19:28:07 (UTC+1) in #10320
>Spread-spectrum time-domain reflectometry
Interdasting.
https://www.t3innovation.com/technologies
Time Domain Reflectometry (TDR) technology has been used over the past 50 years to determine various characteristics of cables like length, whether there is an Open or Short in the cable and the types of terminations or faults that exist and their location. The typical technologies that have been used over these years do not allow the user to work on energized conductors due to high noise caused by current and voltage flows. Spread Spectrum TDR Technology (SSTDR) overcomes these limitations by using reflected multiple spread spectrum signals. Now, for the first time, cables can be analyzed in the field without interruption of signals, voltage or current. In addition SSTDR systems have the additional benefit of being able to precisely locate the position of a fault while cables are fully energized and connected. Accuracy of within a few centimeters over live cables is possible as well. ….
I get it
Looks like it applies to conductors rather than fiber optics
Why at the North Pole though?
What satellites have orbits over the North Pole?
If we assume very sensitive detectors, it should be possible to pick up signals leaking from terrestrial cables?
Just winging it a bit here…
More sauce below
https://en.wikipedia.org/wiki/Spread-spectrum_time-domain_reflectometry
Spread-spectrum time-domain reflectometry (SSTDR) is a measurement technique to identify faults, usually in electrical wires, by observing reflected spread spectrum signals. This type of time-domain reflectometry can be used in various high-noise and live environments. Additionally, SSTDR systems have the additional benefit of being able to precisely locate the position of the fault. Specifically, SSTDR is accurate to within a few centimeters for wires carrying 400 Hz aircraft signals as well as MIL-STD-1553 data bus signals.[1] AN SSTDR system can be run on a live wire because the spread spectrum signals can be isolated from the system noise and activity.
At the most basic level, the system works by sending spread spectrum signals down a wireline and waiting for those signals to be reflected back to the SSTDR system. The reflected signal is then correlated with a copy of the sent signal. Mathematical algorithms are applied to both the shape and timing of the signals to locate either the short or the end of an open circuit. …
I'm not sure the anon is talking about cutting cables. The majority of comms signals these days are carried on fiber optic trunks rather than wireless (microwave) or wireless (satellite), or terrestrial copper wires. The capacity /bandwidth of a fiber optic link is orders of magnitude more than a similar-size copper wire.
I can see the utility of cutting comms transmission cables to force enemy comms onto wireless carriers (microwave, satellite) in order to intercept the comms more easily.
Still not getting North Pole exactly though. Trying to extrapolate a bit beyond known technology to project what might be feasible with state-of-the-art undisclosed tech.