Observed arrival · 2026-11-15
PRIVA-FISC: a proof without the invoice folder
A research prototype that turns fiscal invoice files into a compact proof a bank, financier, or contracting authority can check without seeing the invoices.
- For
- Companies sharing financial evidence with banks or contracting authorities
- Worth noticing
- The demo uses invented invoices; its described audit lets a verifier randomly select invoices for comparison with tax-authority records.
Field notes
The described inputs are a company-signed request.xml and a tax-authority-signed receipt.xml for each invoice, processed on the company's own computer. The prototype says it checks both signatures, numbering gaps, duplicate receipts, and yearly totals before producing a verifier-bound proof. Its follow-up audit is not a full disclosure by default: the verifier can select points in the claimed total and request the corresponding invoices. The sample dataset is explicitly labeled invented.
Observed signals
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