something in the identity integration spec stopped me this morning 😂
honestly? the claim is ambitious. one identity attestation. works on the private CBDC rail. works on the public stablecoin rail. citizen enrolls once, accesses both systems. clean.
but the two rails have completely different privacy models. the private rail uses ZKP to hide transaction details from everyone except designated authorities. the public rail is transparent by design.
the same identity attestation has to function in both environments without leaking private-rail data onto the public chain.
the mechanism described is ZKP on the public side - prove identity is valid without exposing the underlying private data. that part makes sense technically.
what i cant pin down is what happens to the unlinkability guarantee when the same identity is active on both rails simultaneously. private rail transaction plus public rail transaction at the same time. both linked to the same attestation.
a sophisticated observer watching both chains cant definitively link them - but the correlation surface is real and the whitepaper doesnt address it directly.
one attestation that genuinely unifies access across both systems - or a single identity anchor that makes cross-rail correlation easier than having two separate identities would?? 🤔
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