asciilifeform: asciilifeform's original q could be restated as 'how to achieve same thing as satellite, but without any'
asciilifeform: incidentally the problem as originally stated, 'communicate across planet with a few watt, reliably, unjammably, and as close to undetectably as possible' was obsession of usg in 1940s-50s; and was declared 'solved enough' when satellite was built.
asciilifeform: it's a limited resource and whatever crowned idiots sit on whatever thrones, will claim it
asciilifeform: existing gestapo aside, consider also future enemy. because even when the empires of today are forgotten, hogging sw spectrum will be a simple way to make new enemy.
asciilifeform: because per orlov 'collapse never happens for everyone, it only happens for a particular you, one at a time'
asciilifeform: what, gotta break into every single neighbour and see if they have one, lol
asciilifeform: otoh if it is in the house next to mine, i have no way of knowing it
asciilifeform: but it is quite different problem from the original thread's.
asciilifeform: if apeloyee or whoever wants to get past the tank column, mine field, etc. and demolish the receiver -- i'll clap, what.
asciilifeform: upstack : a 1w transmitter , under right conditions, can be heard across atlantic. tricky bit is how to extend this to belownoisefloor; and how to make in 'wrong' conditions.
asciilifeform: and those who want to be gassed faster, gotta work harder, earn it..
asciilifeform: asciilifeform has nfi why he's been standing in line for years, to be gassed. evidently it is a scarce and rationed thing, like everything else in usa.
asciilifeform: everyone - no. the few thou known-вредители -- totally
asciilifeform: because then you're back to the 'if they're standing next to you, you're found' item.
asciilifeform: (receiving. and without leaking oscillator or whatever 20th century idiocy)
asciilifeform: well yes, in the sense that they spend the vast majority of time, silent☟︎
asciilifeform: this is where i started in the gedankenexperiment. from there went 'why not to have the sequence per se be the information carrier'.
asciilifeform: ideally said movement would consist of large number of geographically-dispersed stations, taking turns in a sequence not known to the enemy.
asciilifeform: a block of flats, full of led bulbs, quite possible is the electrical equiv of a 10watt sw station
asciilifeform: also i suspect that 'avoid gestapo' is a very small superset of the much harder 'physically undetectable'. for example, if you pirate on an already unusably-polluted band, you would probably never Have Problems for so long as you are not distinguishable from the usual polluters ( e.g. led light bulbs and other filth )
asciilifeform: that there's the whole noise floor thing, neh.
asciilifeform: at any rate, i'm not convinced that the problem is solvable, apeloyee may well be right. but i also remain unconvinced that it is unsolvable.
asciilifeform: single-photon per bit has been demoed, in ideal conditions.
asciilifeform: 1. if you knew exactly when and where to look.
asciilifeform: go and detect the static spark i just generated. from across the room, much less street.
asciilifeform: hypothetically. problem is to make a balloon stay up for any reasonable length of time, and not loudly show up on radars wherever it goes
asciilifeform: not even from standing across the street.
asciilifeform: q is whether is is possible to turn this param into the equiv of rsa key.
asciilifeform: naturally enemy who gets a hold of your receiver, or whatever secret param, can detect.
asciilifeform: nope, but purely physical invisibilities are a-ok. as radio per se is invisible to savages who never heard of radio.
asciilifeform: but my whole q was whether it is possible to do better than the 100yr state-of-the-art of 'keep moving yet transmitter and be prepared to lose it' thing
asciilifeform: re 30MHz, i could even be entirely wrong, and unusable , because e.g. <7 has vastly different propagation characteristics, day/night/winter/etc vs 7..15Mhz, and in turn from 15..30
asciilifeform: if easier to detect for enemy, easier to detect for intended recipient. and vice-versa. neh ?
asciilifeform: i dun get how the 2 items can be separate
asciilifeform: reason is so that each station can be physically indistinguishable, from outside the door, from, e.g., a defective lift motor that arcs a bit☟︎
asciilifeform: apeloyee: positional mod is superset of that item
asciilifeform: the difference is that the transmitters there physically move; but is immaterial for our purpose
asciilifeform: 1 type of 'positionally modulated' radio, that is already very old tech, is satellite nav.
asciilifeform: naturally 22 is better. and 222 moar so.
asciilifeform: 2 is the bare minimum for a working ( again conjectured, whether it could work ) item.
asciilifeform: 1 , transmitting below noise floor, is equally invisible, but also gives no way to receive...
asciilifeform: it will work with >2, but afaik you only need 2.
asciilifeform: ( i have presently nfi if it is true )
asciilifeform: conjecture was, that you can transmit below noise floor, and still receive by demodulating strictly positionally.
asciilifeform: apeloyee: how do you modulate-by-position if you don't have more than 1 position ?
asciilifeform: while at the same time usably fast. which is the engineering tension there.
asciilifeform: and yes i am in fact allergic to any algo that i do not immediately understand, because entire objective of ffa is to be correct-via-obviousness.
asciilifeform: not the crt per se, but that apeloyee's algo doesn't leak-via-timing, or bias, or avoid some class of prime, is not (yet) obvious to asciilifeform .
