Manuscript VII-J-ST@1 · VII-J-ST.tex · example · f1f1d82c

Example: A joint output can reveal a signal hidden in marginals

Complete channels and intervention-based influence · lines 506–513

VII-J-ST@1#ex:parity

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Encode a classical input bit as , with uniform. Each individual share is independent of , but their joint parity equals . Separate marginal tests cannot replace a joint-output certificate.

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