SIGN's Sovereign Stack Uses ZKPs for Selective Disclosure in National Digital Identity. But Who Governs Schema Updates & Revocation Registries Across Regime Changes?

been tracking SIGN's privacy architecture in the Sovereign Infrastructure whitepaper and honestly? the gap between cryptographic privacy promises and real-world sovereign governance continuity is worth a closer look 😂

what caught my attention:

the whitepaper goes all-in on zero-knowledge proofs (Groth16, Plonk, etc.) + selective disclosure — citizens prove just “over 18” or “eligible for subsidy” without revealing full birthdate, exact income, or other data. unlinkability stops cross-context tracking, minimal disclosure is baked in, and Bitstring Status List handles revocation without leaking privacy. it’s all standards-compliant (W3C VC 2.0, DIDs, ISO mobile ID) for e-visas, border control, academic credentials, and linking private CBDC (Hyperledger Fabric X with namespace isolation) to public stablecoin access.

two completely different paradigms in one system:

ZKPs give citizens granular control on public chains while governments keep full oversight on private Fabric X (central bank runs consensus nodes). selective disclosure + revocation lets you verify compliance (AML/CFT) without exposing everything.

my concern though:

schemas define exactly what data fields issuers can attest to and how revocation works. the whitepaper says governments control schema registration and trust registries, issuers can revoke via on-chain Bitstring lists, but it doesn’t detail the governance process for sovereign deployments — who approves schema changes? who maintains/rotates revocation registries? what’s the upgrade path or dispute resolution when administrations shift?

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