• Wussy@lemmy.world
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    1 year ago

    And here I am thinking that hanging my passwords on the wall as art was hack proof. I guess it’s time to redecorate.

    • Hamartiogonic@sopuli.xyz
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      1 year ago

      You just need to write it smaller than the Wi-Fi wavelength (about 60 nm) and you should be fine. If someone wants to read it, they have to use smaller wavelengths (i.e. higher frequencies), which means there’s a good chance that they will be blocked by your walls.

      Edit: c/2.4 GHz ≈ 125 mm I took the first value from Wikipedia, without thinking about it enough.

      • crapwittyname@lemm.ee
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        1 year ago

        I think your removed packet calculation has got a power of ten wrong somewhere. Wi-fi is GHz so that would be on the order of centimetres I think.

      • Wussy@lemmy.world
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        1 year ago

        What if I use an awesome font like Comic Sans and round the faces like party balloons? Still visible?

        • Hamartiogonic@sopuli.xyz
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          1 year ago

          It’s all about the size. You can’t use an optical microscope to look at details smaller than the wavelength of visible light. You need an electron microscope for that. Similarly, a wifi camera can’t see details smaller that the wavelength.

          If you made a camera that can see in 100 MHz radio waves, you could probably see mountains, rivers and houses, but anything smaller than 3 m would be nothing but blur.