That kind of technology is already widely deployed in walkie talkies - I think I remember at HOPE a speaker mentioning that the NYPD used this technique until they abandoned it due to its inconvenience.
http://en.wikipedia.org/wiki/Frequency-hopping_spread_spectrum On Wed, Sep 25, 2013 at 1:50 PM, grarpamp <[email protected]> wrote: > On 9/25/13, John Young <[email protected]> wrote: > > Now that it appears the Internet is compromised what other > > means can rapidly deliver tiny fragments of an encrypted > > message, each unique for transmission, then reassembled > > upon receipt, kind of like packets but much smaller and less > > predictable, dare say random? > > > > The legacy transceiver technologies prior to the Internet or > > developed parallel to it, burst via radio, microwave, EM emanations, > > laser, ELF, moon or planetary bounce, spread spectrum, ELF, > > hydro, olfactory, quanta, and the like. > > > > Presumably if these are possible they will remain classified, kept > > in research labs for advanced study, or shelved for future use. > > There is a spread spectrum radio tech where you broadcast on > essentially all frequencies / wideband at once. To the eavesdropper > it appears as simply a rise in unlocatable background noise levels. > Yet there is a twist... you and your peer posess a crypto key. That > key is used to select and form a broadcast/reception frequency map > over the entire spectrum. You drive it with software radio. Think of the > map as a vertically slotted grille mask over your spectrum analyzer. > The grille spacing/width/overlap is random. What you see is your > distributed signal hidden in the noise. Pass it down your stack > for further processing and decoding. > > It's been a while since I've seen this described, whether formally, or > applied. Link to paper[s] covering the topic would be appreciated. > -- ————————————— Rich Jones * OpenWatch <https://openwatch.net>* is a global citizen news network. Download OpenWatch for iOS<https://itunes.apple.com/us/app/openwatch-social-muckraking/id642680756?ls=1&mt=8>and for Android<https://play.google.com/store/apps/details?id=org.ale.openwatch&hl=en> !
