FIRE SERVICE
🔐 Barcode Encryption
Each barcode encodes a JSON payload signed with ECDSA-P256. The signed data includes: certificate ID, property SHA-256 hash, compliance status, GPS coords, and expiry timestamp. Only the AFCAS app holds the verification public key.
💳 Physical Card
Standard CR80 credit-card size (85.6mm × 53.98mm) printed on PVC 760 micron stock. Features include holographic overlay, UV-reactive ink for the GNFS crest, and microtext security line around the border.
📱 App Verification
The companion app scans the barcode, extracts the ECDSA signature, verifies it against the embedded public key, then queries the gateway API to confirm real-time status. Works offline with cached key for field use.
🛡️ Anti-Forgery
The signed payload makes duplication useless — any modification to the barcode data invalidates the cryptographic signature. Combined with physical security features (hologram, UV ink, microtext), forgery is computationally and physically impractical.
| Specification | Detail |
|---|---|
| Card Dimensions | 85.6mm × 53.98mm (ISO/IEC 7810 CR80) |
| Material | PVC 760 micron, gloss laminate finish |
| Barcode Format | PDF417 / Data Matrix with ECDSA-P256 signed payload |
| Hash Algorithm | SHA-256 (certificate hash chain) |
| Signature Algorithm | ECDSA with P-256 curve (NIST) |
| Payload Contents | cert_id, property_hash, status, gps, expiry, block_ref |
| Security Features | Holographic overlay, UV-reactive ink, microtext border |
| Verification Method | AFCAS Mobile App (Android/iOS) — offline capable |
| Print System | Batch queue via gateway API, card tracking & dispatch log |