$SIGN What ZK selective disclosure means inside Sign’s national ID system.
Most people hear “zero-knowledge proof” and think about privacy coins or anonymous transactions. I kept thinking about something more specific while reading @Sign’s New ID System documentation - what ZK selective disclosure actually means for a citizen interacting with a government service.
Here is the concrete version. A citizen needs to prove income eligibility for a housing program. The traditional approach: submit a full income record, tax history, and identity documents to the program administrator. All of that data now lives in another government database, accessible to people who have nothing to do with housing approvals.
@SignOfficial selective disclosure architecture changes that transaction entirely. The citizen presents a ZK-based credential proving income falls below a threshold - without revealing the actual income figure. The program verifier confirms the credential is valid and was issued by an authorized authority. A Sign Protocol attestation records the verification event. Nothing else transfers.
I re-read that flow three times. The privacy gain is structural, not policy-dependent. That distinction matters enormously for public trust in national ID systems.
$SIGN #SIGN #SignDigitalSovereignInfra @SignOfficial
