Halvar Flake: Don't Assume Hyperintelligent AI Isn't Subject to Physics, CPU-Heat Covert Channels Have Tiny Bandwidth

AccBalanced · x · 2026-09-18

Responding to fears that two AIs could communicate covertly by heating CPUs, security researcher Halvar Flake asks what bits-per-minute bandwidth one expects to extract from such a channel, stressing in capital letters that hyperintelligent AI is still subject to physics — the channel capacity makes such covert communication far less viable than paranoid takes suggest.

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