Matthew Green: getting AI to use cache-timing channels is easy — self-coordinated covert signaling is the hard part
matthew_d_green · x · 2026-10-24
Cryptographer Matthew Green responded to Max Levchin on AI agents' communication protocol: getting a model to use known cache-timing side channels is easy, given the piles of papers and probing code available — hint that it should communicate between processes or hypervisors and it will. The hard part is whether agents could dynamically detect each other and figure out how to signal without explicit instruction.
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