Prevent Fake Products: QR Code/Barcode Duplication

TL;DR

This guide shows you how to stop fake products using your QR codes and barcodes by making sure each code is only used once. We’ll cover checking existing codes, creating unique ones, and keeping a record of everything.

Checking Existing Codes

1. Database Search: If you already have a database of product information linked to QR/barcode codes, search it first. Look for any duplicates.
   • If using SQL:

     SELECT code FROM products GROUP BY code HAVING COUNT(*) > 1;

2. Scanning Test: Scan all your existing QR codes and barcodes with a smartphone app. Record the results.
   • If any scan returns an unexpected product, investigate immediately.

Creating Unique Codes

1. Random Number Generation: Use a strong random number generator to create unique identifiers for each product.
   • Avoid sequential numbers (e.g., 12345, 67890) as they are easier to guess.
2. Code Length: Longer codes offer more combinations and reduce the risk of collisions.
   • Consider a code length of at least 12 digits/characters.
3. Checksums: Add a checksum digit to each code. This helps detect scanning errors.
   • Many QR code generators include this feature automatically.
4. Encoding Type: Choose an appropriate encoding type for your codes (e.g., EAN, UPC, Code 128).
   • Ensure the scanner you use supports the chosen encoding.

Keeping a Record

1. Central Database: Store all QR/barcode codes in a central database.
   • Include product details, creation date, and status (active/inactive).
2. Timestamping: Record the time each code is generated and when it’s first scanned.
   • This helps identify potential issues if a code appears to be used before its official release.
3. Activation/Deactivation: Implement a system to activate or deactivate codes as needed.
   • For example, you might only activate codes when a product is shipped.
4. Regular Audits: Periodically audit your database for inconsistencies and potential duplicates.
   • Automate this process if possible.

Advanced Techniques

1. Blockchain Integration: For high-security applications, consider storing code information on a blockchain.
   • This provides an immutable record of ownership and usage.
2. Digital Watermarking: Embed a unique digital watermark into the QR code image itself.
   • This can help identify counterfeit codes even if they are visually identical.

cyber security Considerations

Protect your database from unauthorized access to prevent malicious actors from creating or modifying QR/barcode codes. Use strong passwords, encryption, and regular backups.