log☇︎
67700+ entries in 0.016s
asciilifeform: !~later tell phf do you know this https://archive.org/details/bitsavers_metheusSch_74035988 d00d ?
asciilifeform prepares for... second expedition
asciilifeform: should be km+
asciilifeform: and wtf, fryingpan sized spatial range, wai wai
asciilifeform: https://spatmodulation.cms.orange-labs.fr << authors.
asciilifeform: imho it is a quite obvious idea. but the above is the closest asciilifeform found to any record of it having been attempted.
asciilifeform: Because It Would Be Wrong etc.
asciilifeform: nobody, afaik, tried using ~only~ spatial.
asciilifeform: 'First Demonstration and Visualization of Receive Spatial Modulation Using the “Radio Wave Display”' march 2017
asciilifeform: in other lulz, the french apparently did almost think of http://btcbase.org/log/2017-11-04#1733006 a while back, but 'additional signal to help receive normal one' snore, https://hal.archives-ouvertes.fr/hal-01489004/document ( sorry, pdfola ) ☝︎
asciilifeform: i haven't even heard of either party prior.
asciilifeform: the derps are literally indistinguishable to asciilifeform's unarmed eye
asciilifeform: http://btcbase.org/log/2017-11-05#1733088 << try as i might , i cannot tell who , if anyone, is the ant, and who , if anyone - the anteater ☝︎
asciilifeform: entomologists only.
asciilifeform: mircea_popescu: for the obvious reason
asciilifeform: ( something like ye old 'leah' but steals half-chewed tmsrisms to grease the implement )
asciilifeform: hybrid of bulldog and rhinoceros, verily
asciilifeform: in other lulzies, https://archive.is/pb0ZM
asciilifeform: ( observe that 'fox hunting' for ulw is ~impractical, not only from sheer physical dimensions of the receiver , but from signal strength being approx same on entire planet, regardless of where you tx from )
asciilifeform: what i suspect you get, is something quite like the ultralongwave submarine transmitter, but without the monstrous mains current bills.
asciilifeform: *conventional
asciilifeform: 1 reduces to convention radio, where the signal carries meaning.
asciilifeform: 3rd, 4th, ... dun help any.
asciilifeform: and not 3, and not maxint.
asciilifeform: for same reason you an' i, have 2 eyes ☟︎
asciilifeform: thereby scheme reduces to looking for a truly rngistic signal that at all times is known ~in advance~, but from 2 or more diverging physical directions; and comparing.
asciilifeform: ( and can just as easily substitute ~actual~ otp in place of the prng, if you like , the exact mechanics of generating the noise waveform are irrelevant other than for the fact that they must be repeatable )
asciilifeform: i.e. individually the signals are meaningless
asciilifeform: the prongs thing is quite like the xor-otp structure removal transform from the ciphers thread
asciilifeform: receiver needs to know 1) prng seed for each 2) the band 3) his physical position relative to the prongs of the station
asciilifeform: re: cryptoradio, here's a gedankenexperiment: consider a tx station consisting of 2 separated (by, say, a km+ of cable) transmitters; each sends prng soup across a few 100MHz . modulation of payload is strictly via altering their relative ~amplitudes~ . ☟︎
asciilifeform brb, meat
asciilifeform: so subj is really a restatement of asciilifeform's orig q : how does the fox's equip have to differ from the extant.
asciilifeform: 'not using hunter's equipment' still requires a meaningful difference to exist. just as in the case described in old trilema, where some illiterate camel fucker reinvented caesar's cipher ( and unsurprisingly exactly as breakable as if caesar were resurrected and using his , because why not , despite 'not issued by hunter')
asciilifeform: http://btcbase.org/log/2016-12-24#1590007 << subj ☝︎
asciilifeform: naturally fox will make own, rather than using hunter's, gear.
asciilifeform: whole q, from asciilifeform's pov, is 'what should the fox do, if playing without rules, in battlefield, not in karateka'
asciilifeform: still passive, he has a triangle of receivers pointing in orthogonal planes.
asciilifeform: mircea_popescu: unfortunately noise is not a scalar : enemy can distinguish your transmitter from supernovae, strictly from the fact that the latter happen 'in the sky' and the former -- not
asciilifeform: ( admittedly spark plug 'fox hunt' worx great in the otherwise rf-quiet jungle, but would not in a city or anywhere remotely industrialized )
asciilifeform: even without carrier, possible to find. consider usg's adventure in vietnam, where they picked up spark plug noise from trucks on ho chi min trail.
asciilifeform: ( as all existing radios use )
asciilifeform: mircea_popescu: depends how transmit. if with carrier -- than trivially found
asciilifeform: idea is that for the enemy, without the key, you are below noise floor; but for the intended recipient, who knows how to look -- above.
asciilifeform: even if it takes, say, a whole minute to move a byte.
asciilifeform: apeloyee: difficult is ok. so long as for intended man -- possible, for the unintended -- impossible.
asciilifeform: well it's a sport, they use agreed-upon standard item, just like both tennis players get same type of racket, etc
asciilifeform: passive.
asciilifeform: it isn't a particularly mysterious process.
asciilifeform: incidentally, rf 'fox hunting' is at this point a traditional sport in ru, and the 'fox' is always found . ☟︎
asciilifeform: apeloyee: what i'd like is http://btcbase.org/log/2017-11-02#1732165 + if you ~do~ somehow detect the fact-of the transmission, it ought to look exactly like the source had wings and zipped randomly around the continent. ☝︎
asciilifeform: can just as easily be, say, 17 sources geographically dispersed , working in concert
asciilifeform: apeloyee: transmitter does not have to be a point source
asciilifeform: they sit around and 'make rules' for it, same as 'for blockchain laundering' etc.
asciilifeform: *aperiodic
asciilifeform: oh upstack re radios, the 'why not use aperidic wave, and entire spectrum' thing was of course not long ago hannobockized and redhatized by usg shills, as 'uwb (ultrawideband)' and 'regulated' and other rubbish. ☟︎
asciilifeform: also met a phriend of his, who asked not to be named, who traded 2 bolix 'ivory' cpus for asciilifeform's 1 bolix-3620 .
asciilifeform: ( iirc he was stuck with unpleasant meatspace chores for a long while. )
asciilifeform: i'll let the man speak for himself
asciilifeform: orig point being that directionfinder gear makes life unreasonably easy for the enemy
asciilifeform: i haven't verified that the 3rd rail in the underground is 800 volts hot, yet, either.
asciilifeform: between all of this, usg does still enforce its monopoly on long-range telecom.
asciilifeform: was this the fetlife thing
asciilifeform: lol!
asciilifeform: ( incidentally the other day asciilifeform finally met phf in meatland ) ☟︎
asciilifeform: exactly like the 'cypherpunks' as described by phf in old thread
asciilifeform: there is also quite a bit of fixation, among the aficionados, on the physical process of building the radios, stringing antennae through treetops, and other minutiae.
asciilifeform: as i currently understand, it is a kind of primitive voice-powered usenet group, with the diff that you can get gestapo to pick up spammers
asciilifeform: to this day i puzzle over what is the appeal of 'licensed amateur radio'
asciilifeform: exactly like
asciilifeform: they'll work for phree, for weeks, charging usg 0, to find the vreditel'
asciilifeform: it is normally the crown-licensed user of the 'trespassed' spectrum, who rats him out. in almost all cases on the public record -- 'licensed amateurs'
asciilifeform: incidentally phunphakt re usa : it is virtually never usg.proper that hunts for radio pirates
asciilifeform: ( in mega-b00k re 'evil fyoootoor' , 'stand on zanzibar', this process becomes a proper service, for which they charge, and you can get not only firing squad but whatever you like, burning at the stake, guillotine, etc. ) ☟︎
asciilifeform: hey it's a pretty effective method -- entire firing squad, 'for free', on call
asciilifeform: ( what whatever reason, convincing police to shoot is a popular suicide method in usaschwitz. rather like it was in orig auschwitz. )
asciilifeform: some % are 'assisted suicides'
asciilifeform: http://www.tampabay.com/news/publicsafety/crime/Police-Lakeland-man-71-refused-orders-dies-after-police-confrontation_162282650 << fresh one
asciilifeform: ^ would be slightly moar interesting if had mug shots
asciilifeform: let's momentarily dispense with the broken doors and midnight policemen, and consider battlefield , where everybody's properly armed etc. for clarity of thought. conventional radio -- triangulable and draws accurate fire on its position. q is, can haz one that does not ? or not.
asciilifeform: ( though as often car as bus )
asciilifeform: around here plenty
asciilifeform: even more likely to be run down by bus crossing the street
asciilifeform: mircea_popescu must be one of the folx who brings own bomb on every plane, as in the famous anecdote, 'probability of 2 bombs is epsilon'
asciilifeform: the 'could fight to the death to defend the radio' proposition is orthogonal to the q of 'can haz pill against foxhunters' .
asciilifeform: and when gestapo says 'transmitter here' and they break the door, it in fact is there.
asciilifeform: generally with old-fashioned tech, directionfinder works.
asciilifeform: concern is, it is prohibitively expensive for gestapo to search 100,000 houses. but not 10. hence 'fox hunt'.
asciilifeform: mircea_popescu: and tesla picked up 'martians' , lol.
asciilifeform: ( 1 elementary approach : carrierless transmission . )
asciilifeform: apeloyee: q was, is it possible to transmit in such a way that for someone without the key, there ~is~ no 'signals received' ☟︎
asciilifeform: goodenuff for inquisitor, but painful for reversing.
asciilifeform: and some % of bits will flip
asciilifeform: about 10k usd, and you need 1 per stick type.
asciilifeform: ( you freeze conventional ramstix and read out in specially built reader )
asciilifeform: but is barbaric
asciilifeform: there ~does~ exist that rig with the freon bottle
asciilifeform: if mircea_popescu or anyone else knows of anything resembling this item off-the-shelf -- plox to link.
asciilifeform: http://btcbase.org/log/2017-11-03#1732785 << on the contrary, it is not publicly available for any kind of money ( and would need some gnarly custom silicon, to produce ) ☝︎
asciilifeform: if nobody's raped'em through it, it is because evidently nobody can be arsed. ☟︎