[Cryptography] Lava Lamps Can Actually Create Secure File Encryptions - Here's How

[Kent Borg]

On 3/4/26 2:30 PM, Jon Callas wrote:
> The effect works better in the dark, of course because when there's a lot of light it washes out the noise. Nonetheless, it's easy to adjust ISO, use ND filters (or even better, IR filters). You just want sensor noise, that's all.

Be careful with your cameras, they can't be trusted to just take a 
picture these days, who knows what post-processing you will get this 
week. Given what cameras optimize for (what people can see and like to 
see), lava lamps seem a better target than black, the lava lamp 
gyrations seem likely to make it through to the other side as entropy.

Random number generators can fail in so many silent ways.


-kb, the Kent who suggests being careful with sound, too, as codecs can 
sneak in and silence what they perceive to be silence.


P.S. Iphones have a setting the discourages the camera from too much 
tampering, I think it is named something about taking pictures more 
quickly. Though who knows what it will be and what it will do next week, 
and what /I/ heard has to be at least a week old by now.

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