Chống hàng giả bằng QR Codes
Serialisation is the foundation of QR-based product authentication. Each unit receives a unique identifier during manufacture, the identifier is encoded as plain text or as a verification URL, applied to the product or its packaging, and registered in a central database. A consumer scan resolves the serial and returns an authentication verdict together with product and provenance detail. Repeated scans of a single serial from scattered locations are themselves a counterfeiting signal. Some systems extend the record onto a blockchain, writing manufacturing, shipping, distribution and retail events so that a scan verifies a chain of custody rather than a single database lookup.
Anti-Counterfeiting with QR Codes
QR codes provide a practical, scalable approach to product authentication. From luxury goods to pharmaceuticals, QR-based anti-counterfeiting systems help consumers verify product authenticity.
Serialisation
The foundation of QR-based authentication is serialisation — each product receives a unique identifier:
- Generate a unique serial number during manufacturing
- Encode the serial in a QR code (as plain text or URL)
- Apply the QR code to the product or packaging
- Register the serial in a central verification database
When a consumer scans the code, the system checks the serial number and reports whether the product is genuine.
Cloud Verification
The most common approach:
- QR code encodes a URL:
https://verify.brand.com/check/ABC123XYZ - The server looks up the serial number
- Returns authentication status, product details, and provenance information
- Tracks scan patterns (multiple scans from different locations may indicate counterfeiting)
Blockchain Verification
Some systems record product lifecycle events on a blockchain:
- Manufacturing entry, shipping, distribution, retail sale
- Each scan can verify the chain of custody
- Immutable records prevent database manipulation
- Transparency allows consumers to verify provenance
Anti-Tampering Measures
Physical QR code security features:
- Tamper-evident labels that break when removed
- Holographic QR codes combining visual and digital verification
- Hidden secondary codes under scratch-off layers
- Serialised codes unique to each unit (batch codes are easily replicated)
Industry Applications
| Industry | Application | Verification Method |
|---|---|---|
| Pharmaceuticals | Drug authentication (FDA UDI) | Cloud + regulatory database |
| Luxury goods | Handbag, watch authenticity | Cloud + NFC dual verification |
| Electronics | Component authenticity | Cloud + serial registration |
| Wine and spirits | Bottle authentication | Cloud + tamper-evident seal |
| Automotive | Spare part verification | Cloud + manufacturer database |
Key Takeaways
- Serialisation (unique code per product) is the foundation
- Cloud verification provides real-time authentication status
- Blockchain adds immutable provenance records
- Tamper-evident materials prevent QR code sticker replacement
- Batch codes are insufficient — each product must have a unique serial
Câu hỏi thường gặp
How does a QR code establish that a product is genuine?
Through serialisation. A unique identifier is generated during manufacture, encoded into the symbol as plain text or as a verification URL, applied to the product, and registered in a database. A scan resolves that serial and returns an authentication verdict with product and provenance detail.
What stops a counterfeiter from copying the QR code itself?
Nothing prevents duplication of the image, which is why the database matters more than the symbol. A single serial scanned repeatedly from scattered locations is the signature of a copied code, and that pattern is detectable even though each individual scan looks ordinary.
What does a blockchain record add to product verification?
A chain of custody rather than a single lookup. Manufacturing, shipping, distribution and retail events are written as the product moves, so a scan can verify the sequence of custody events instead of only asking whether the serial exists in a table.