A software-based External Sales Data Controller for Vanuatu fiscalization — invoices signed locally on a government TaxCore secure element, online or offline. The full SDC Analyzer conformance suite has been passed and the product is now under official accreditation review.
Manufactured by ReefStack Technologies
Vanuatu requires every business to issue digitally signed fiscal invoices. Without an E-SDC, every sale needs an internet round-trip to the cloud — and stops when the connection drops.
Sign invoices on the smart card with no internet. Queue encrypted audit data and sync automatically when you reconnect.
No per-invoice network round-trip. No PAC code per sale. The card signs locally in milliseconds.
QR verification URLs, fiscal journals, AES-256 encrypted audit packages, all TaxCore command types — built to spec.
Everything needed for compliant fiscalization, in one small Windows application.
Every receipt is signed by the government TaxCore secure element — a legal fiscal document, no cloud dependency.
Runs quietly in the background. Status, PIN entry, taxes, and audit progress — all visible from the tray icon.
If the internet is down for a long time, offload queued invoices to a USB stick and deliver physically.
No installer, no runtime dependencies. Copy one ~5 MB
.exe to the PC and run.
A 10 MB debug log for troubleshooting, plus a separate 30-day accreditation error log — both human-readable.
Pre-seeded with Vanuatu tax rates. Integrates with CloudPOS.vu out of the box over loopback HTTP.
The E-SDC sits between CloudPOS.vu and the smart card, signing invoices locally and syncing audit data when online.
┌──────────────┐ HTTP/JSON (loopback) ┌──────────────┐ APDU (ISO 7816) ┌──────────────┐ │ CloudPOS.vu │ ──────────────────────►│ E-SDC │ ─────────────────►│ Smart Card │ │ (POS) │ ◄──────────────────────│ │ ◄─────────────────│ (SE applet) │ └──────────────┘ signed fiscal receipt└──────┬───────┘ └──────────────┘ │ HTTPS + PKI mTLS (when online) ▼ ┌──────────────────┐ │ TaxCore.API │ └──────────────────┘ Normal sale → sign on card → return receipt → queue audit → sync later
| Manufacturer | ReefStack Technologies |
| Product | ESDC for CloudPOS.vu |
| Type | Software-based E-SDC (TaxCore v3) |
| Platform | Windows 10 / 11 (64-bit) |
| Distribution | Single native executable (~5 MB) |
| Card reader | Any PC/SC-compatible USB CCID reader |
| POS integration | CloudPOS.vu via loopback HTTP (TaxCore v3 protocol) |
| Signing | On-card via TaxCore Secure Element (APDU ISO 7816) |
| Audit encryption | AES-256-CBC + RSA-PKCS#1 key wrap |
| Connectivity | Internet for init + remote audit; offline signing supported |
The E-SDC is feature-complete and passed the full SDC Analyzer conformance suite with zero failures. Official accreditation by the Vanuatu tax authority is in progress. Contact us about rollout for your business.
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