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Communication by means of modulated Johnson noise

66 points · 35 comments · austinallegro

  1. frumiousirc · · focus · HN ↗
    > the maximum achievable throughput is 26 bps at 1.5 m and goes down to 22 bps at 4.5 m.

    And when there are more than one transmitters in real world conditions instead of anechoic chamber?

    It's cool and all and if this work is for it's own sake, for the sake of research, no issues. But otherwise, I struggle to think of practical use cases. I grant that my imagination may be deficient.

    1. dist-epoch · · focus · HN ↗
      > I struggle to think of practical use cases.

      I guess your not on Twitter. It's not a coincidence this research paper from 2022 got posted today.

      1. badatnames · · focus · HN ↗
        What happened today ?
        1. Avicebron · · focus · HN ↗
          I think someone from OpenAI said something like "air gapping AI can't (hypothetically) work because it will figure out a way to basically morse code across the airgap". (I think this was in response to people calling them out for not airgapping)
          1. TeMPOraL · · focus · HN ↗
            > "air gapping AI can't (hypothetically) work because it will figure out a way to basically morse code across the airgap"

            All things well-known for good two decades and written about by x-risk/LessWrong crowd, but to date continued to be dismissed as lunacy.

            On one hand it's great to see it demonstrated in practice in concrete terms, on the other hand it's sad we have to basically make the mistakes ourselves, with live and close-to-dangerous systems, because we can't believe the obvious warnings.

            1. Avicebron · · focus · HN ↗
              You're likely not familiar with TEMPEST/EMSEC but this stuff was known about and discussed when designing air gaps going back to the 60s..

              <a href="https:&#x2F;&#x2F;www.nsa.gov&#x2F;portals&#x2F;75&#x2F;documents&#x2F;news-features&#x2F;declassified-documents&#x2F;cryptologic-spectrum&#x2F;tempest.pdf" rel="nofollow">https:&#x2F;&#x2F;www.nsa.gov&#x2F;portals&#x2F;75&#x2F;documents&#x2F;news-features&#x2F;decla...

              the x-risk&#x2F;LessWrong crowd aren&#x27;t adding anything to the conversation that seriously people haven&#x27;t already considered.

              1. demritocracy · · focus · HN ↗
                We need a Wildfire base like in the Andromeda Strain
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