Given my background, I wouldn't rely on SSH only. Unless I'm SSHing to a gateway somewhere, and making my other connections only via the proxy gateway. You see, I don't want to give any food even to the traffic analysis. I prefer to mask the IP addressess and port numbers as well.
I'm positive that a coding or modulation scheme can be concoted that leaves a small number of narrow windows in the RF spectrum less contaminated. A small number, narrow windows. As you no doubt are aware, the bandwidth occupied by a transmission is the symbol rate. So, if I have 2 Mbit/s line, it is going to occupy 2 MHz of bandwidth -- in segments, if necessary. Unless we get the center frequency up to 15..20 MHz, it is going to block everything. And the higher the frequency, the less optimal the transmission line, and the more it will radiate.
Power line frequency is not only far too low to provide usable bandwidth, but the various reactive and especially switching loads are continuously modulating the 50 Hz (or 60 Hz) carrier in an unpredictable and uncomfortable manner, in phase and amplitude alike.
The voluntary emergency communications infrastructure in the US as well as many other countries use uncoordinated frequencies: the parties are free to make their allocations within given bands.
What is going to happen is that the technology will be pushed through, despite the lone voices in the desert protesting against it. Only later when everyone and their cousin is relying on the technology, will the problems become evident, and a loud indignant noise will be heard saying "we didn't want this."
Speaking of lone voices in the desert, I have found it to require a bit of work to find objective expositions of any power-line communication technology. Either it is touted as the technology that will save us from any internet connectivity problems for the rest of time, or it is soundly denounced as the most devilish invention since [abomination of your choice].
Another problem with broadband on power lines is that it'll supply tons of *hash* directly to _anything_ that's plugged into a wall. That means you'll get noise on your stereo, DVD, TV, radio, and your _computer_. There's barely enough filtering in most consumer products to kill the sixty cycle hum - broadband will wreak everyone's home entertainment centers.
I'm not quite sure... Of course, there's an easy test. If the power cycling of the fridge, freezer, water heater, washing machine, and other such loads will cause an audible click or otherwise noticeable glitch in your equipment, then the data might be a problem, too. If, however, those high-intensity events are not witnessed on the equipment, I would feel the equipment would be immune to the data, as well.
My stereos do not pass this test. The computer does, as well as the FM monitor receiver. Admittedly, the last item is not strictly a consumer grade product.
But you are giving me hope. Perhaps, at a long last, we will see a benefit from the insufficient electromagnetic compatibility of consumer products.
(no subject)
I'm positive that a coding or modulation scheme can be concoted that leaves a small number of narrow windows in the RF spectrum less contaminated. A small number, narrow windows. As you no doubt are aware, the bandwidth occupied by a transmission is the symbol rate. So, if I have 2 Mbit/s line, it is going to occupy 2 MHz of bandwidth -- in segments, if necessary. Unless we get the center frequency up to 15..20 MHz, it is going to block everything. And the higher the frequency, the less optimal the transmission line, and the more it will radiate.
Power line frequency is not only far too low to provide usable bandwidth, but the various reactive and especially switching loads are continuously modulating the 50 Hz (or 60 Hz) carrier in an unpredictable and uncomfortable manner, in phase and amplitude alike.
The voluntary emergency communications infrastructure in the US as well as many other countries use uncoordinated frequencies: the parties are free to make their allocations within given bands.
What is going to happen is that the technology will be pushed through, despite the lone voices in the desert protesting against it. Only later when everyone and their cousin is relying on the technology, will the problems become evident, and a loud indignant noise will be heard saying "we didn't want this."
Speaking of lone voices in the desert, I have found it to require a bit of work to find objective expositions of any power-line communication technology. Either it is touted as the technology that will save us from any internet connectivity problems for the rest of time, or it is soundly denounced as the most devilish invention since [abomination of your choice].
(no subject)
*That* should put the kybosh on it.
-m
(no subject)
My stereos do not pass this test. The computer does, as well as the FM monitor receiver. Admittedly, the last item is not strictly a consumer grade product.
But you are giving me hope. Perhaps, at a long last, we will see a benefit from the insufficient electromagnetic compatibility of consumer products.