🔐 Blockchain Security Layer

Asset Identity Certificate

Tamper-proof digital passport for medical equipment enabling cross-facility verification and stolen asset detection

CHAIN OF CUSTODY FLOW 1. MANUFACTURER 🏭 Philips Healthcare ✓ Signed Signs 2. DISTRIBUTOR 🚚 MedTech SA ✓ Signed Adds sig 3. HOSPITAL 🏥 Chris Hani Bara ✓ Signed Deploys 4. ASSET IN SERVICE 💓 CERT 3 sigs ✓ BLE Broadcasts identity ✓ KNOWN ASSET 📶 Gateway 🔍 Verify ✓ Trusted 📍 Track Genesis hash matches trusted registry ⚠️ UNKNOWN ASSET 📶 Gateway 🔍 Verify ❓ Unknown 🚨 ALERT "Where are you from, mate?" TRUSTED REGISTRY 🏥 CHBAH ✓ 🏥 Charlotte ✓ 🏭 Philips ✓ National/Regional
💓

Philips MX800 Patient Monitor

Chris Hani Baragwanath Academic Hospital

✓ Verified
Asset Tag
AST-001
Serial Number
PHM-2024-00142
Genesis Hash (Birth Certificate)
a1b2c3d4e5f6...genesis_chbah_2024
Public Key
04:7B:2F:9A:E1:8D:5C:3B:6F:A2:1E:9D:4C:7B:8A:F3...
Issue Date
2024-03-15
Issuing Authority
CHBAH Asset Mgmt
Chain of Custody Signatures
🏭
Manufacturer
sig_philips_0x7f...
🚚
Distributor
sig_medtech_0x3a...
🏥
Hospital
sig_chbah_0x9c...
⟷
Gateway Verification

🛡️ Cross-Facility Verification

1

Tag Detection

Gateway detects BLE tag broadcast containing certificate fingerprint

2

Genesis Validation

Check genesis hash against national/regional hospital registry

3

Signature Chain

Verify all custody signatures are valid and unbroken

✓

Identity Confirmed

Asset recognized as legitimate - add to local tracking

!

Unknown Origin Alert

"Where are you from, mate?" - Flag for investigation

Certificate Data Model

📜

asset_certificates

certificate_id UUID
asset_id INTEGER
genesis_hash VARCHAR(64)
public_key TEXT
issuer_id VARCHAR(50)
issue_date DATETIME
expiry_date DATETIME
status ENUM
✍️

custody_signatures

signature_id UUID
certificate_id UUID
signer_type ENUM
signer_id VARCHAR(100)
signature VARCHAR(128)
signed_at DATETIME
prev_signature VARCHAR(128)
🏛️

trusted_issuers

issuer_id VARCHAR(50)
name VARCHAR(200)
issuer_type ENUM
public_key TEXT
genesis_hash VARCHAR(64)
trust_level INTEGER
is_active BOOLEAN