This was mentioned in a whitepaper of sorts, maybe in a few papers around that time, noting that the tech might perhaps be ideal for Anti-Censorship / Anti-Surveillance / Guerrilla Comms that need to be robust against generally all forms of traditional radio adversaries.
Can anyone post links to such papers? And what links are there to software and hardware modules that can be plugged in for experimentation, and or joined for further development? Recollection provides only concept hints, pasted in below from various. Thanks. > Probably also coming soon, very high PGs wherein the codes, bandwidth and > frequencies quickly hop according to a shared secret. > This combination is being explored for possible Next > Generation military comms. It is said that this is already in public knowledge and operation within SDR community. Though instead of the conventional "bandwidth and frequencies", all the observer sees on their spectrum is random noise, let's say across entire spectral ranges... from start freq to end freq of entire frequency range of ATSC / WiFi / Cellular / FM / Etc allocation space... more generally, across entire start to end of whatever capability range of the tx / rx hardware in use. And where a pre shared or negotiated key is used to impart or mask data into, and out of, the noise. It's not even that these may have, or be, waveform carriers, as the noise may be spark gaps driven, impulse / transform function generators, etc. One might not even have to generate their own noise, perhaps the RF key could simply be used as filter to existing noise. And the difficulty in triangulating such noise if so, ie: how exactly does one lock onto random energy, the galactic radiation problem, from everywhere and nowhere. The concept is that the RF as roughly described in whatever paper cannot be jammed or DOS'd... your RF would appear as noise to all but those holding the RF spectrum noise key, so the only way to jam it, if you even knew it was in use in the first place (say by noting an overall spectrum power bump) would be to raise the noise floor by emitting... you guessed it, random noise... which would wipe out the S/N dB's you need for your own comms be they traditional AM / FM / etc, or this keyed noise tech. So you'd end up in a mutually assured destruction, essentially who can throw more power in the air. You'd probably be able to get more local power up, hop by hop, than a wide area adversary tying to blanket you, so you'd win. Assuming you needed to tx anything instead of just filtering. You need the RF noise key to cipher the RF, so the underlying data packets are always secure and unaffected by the above. Data would be affected by nodes that are involved in the data layer, before it gets pushed up to or down from RF. That's a trusted evil maid problem and thus out of scope. > https://lists.cpunks.org/pipermail/cypherpunks/2016-February/027605.html > previous discussions have suggested MIMO for beam forming / phased array > signal emission that lets you do fancy things, like emulate a moving > transmitter. if the transmitter appears to be constantly moving, it's a much > harder target _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
