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November 5, 2025Modern cars are complex software platforms on wheels
As an automotive software engineer with ten years in connected vehicle systems, here’s what fascinates me: the way we track software origins in cars shares surprising similarities with how coin collectors verify rare coins. That “pedigree” concept from numismatics? It’s become essential for keeping your car secure on the road.
Why Software Lineage Matters for Your Safety
Think about how collectors demand paperwork tracing a coin’s history. We need that same rigor for your car’s software. Today’s luxury vehicles run on over 150 million lines of code across 70+ computers (we call them ECUs). Without proper version tracking and authentication, we’re driving blind.
What Coin Collectors Teach Us About Security
Those famous coin pedigrees like Eliasberg or Pittman aren’t just bragging rights – they’re blueprints for automotive security. We’ve adapted their principles to create:
- Complete software ingredient lists (BOM traceability)
- Tamper-proof update systems
- Digitally signed firmware
- Unchangeable maintenance records
Building Digital Birth Certificates for Car Software
We’re using blockchain-inspired tech to create permanent software pedigrees. Here’s a simplified version of how we track firmware:
// Generate firmware pedigree record
const createSoftwarePedigree = (firmware, supplier, timestamp) => {
const hash = sha256(firmware + supplier + timestamp);
return {
version: firmware.version,
supplierId: supplier.did,
buildTimestamp: timestamp,
cryptographicHash: hash,
previousVersionHash: firmware.baseHash
};
};
Protecting Your Car’s Nervous System
The CAN bus (your car’s internal network) faces risks similar to unverified coins. Just as counterfeit coins fool collectors, fake CAN messages can trick your brakes or steering.
Code in Action: CAN Message Security
Here’s how we authenticate critical messages:
// Pseudocode for CAN message signing
void sendSecureCANMessage(uint32_t id, uint8_t data[8]) {
uint8_t mac[4] = generateHMAC(data, secretKey);
CAN_message_t msg;
msg.id = id;
memcpy(msg.buf, data, 8);
memcpy(msg.buf+8, mac, 4);
CanBus.write(msg);
}
Stopping Imposter Components
Using hardware security modules, we create ECU identities that:
- Confirm message sources
- Keep encryption keys separate
- Automatically disable compromised parts
Trustworthy Software Updates While You Sleep
Just as collectors rely on grading services, your car needs verified updates. Those “Over-the-Air” upgrades require:
Version Control That Doesn’t Quit
We treat software updates like rare coin documentation:
OTA_Update {
vin: "1HGBH41JXMN109186",
currentFirmware: "v2.1.8",
targetFirmware: "v2.2.0",
diffHash: "sha256:9f86d08...",
signature: "ecdsa:P256:3046..."
}
Real-World Example: Tesla’s Two-Key System
Tesla’s update approach works like a collector’s vault:
- Developers sign with key #1
- Factory authorizes with key #2
- Car verifies both signatures
- All steps recorded permanently
Securing Your Car’s Digital Conversations
As vehicles talk to traffic lights and other cars, we apply coin-authentication thinking to every data exchange.
Hardening Your Car’s Computers
Each ECU gets protection worthy of rare coins:
- Secure startup verification
- Continuous process checks
- Tamper-evident logs (like pedigree papers)
Safe Car-to-World Communication
Vehicle-to-infrastructure messages get full authentication:
struct V2XMessage {
timestamp: uint64_t,
messageType: uint8_t,
payload: uint8_t[256],
certificate: x509,
signature: ecdsaSig
};
5 Security Upgrades Every Car Maker Needs
Stealing from the coin collector’s playbook:
- Track all software ingredients (SBOM)
- Sign every ECU communication
- Store keys like precious metals
- Keep unalterable update records
- Audit third-party parts regularly
The Road Ahead: Cars Worth Trusting
The careful provenance tracking in numismatics gives us a model for automotive security. By treating software components with the same care as pedigree coins – verifying origins, documenting changes, building fraud-proof systems – we create vehicles deserving of your trust. As cars become rolling computers, this isn’t just engineering best practice. It’s how we keep drivers safe in the connected age.
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