​​Using Barcode Verification to Combat Counterfeit Products​

We've all come across a fake product at some point, whether it’s a knockoff handbag or a designer watch, or even a questionable bottle of vitamins. While barcodes were invented to streamline tracking and improve data entry, their widespread use has made them vulnerable to manipulation. This opens the door for counterfeit products and parts, affecting industries like pharmaceuticals, cosmetics, luxury goods, tobacco, and alcohol. The consequences can be serious – ranging from lost revenue and malfunctioning equipment to potential legal action.

Nobody wants fake products to make it to market, but it happens. They not only harm brand integrity but can result in serious safety risks. In 2024, U.S. Customs and Border Protection seized over 490 counterfeit airbags. A fake airbag may fail to deploy or even explode on impact. With counterfeiting on the rise, manufacturers are turning to innovative solutions to keep products authentic and safeguard consumers.

Barcodes: a critical tool for protecting against fakes

By combining manufacturing technology with reliable authentication measures, the industry is securing supply chains and ensuring consumers receive genuine products. One approach is using both traditional barcodes and 2D codes for easy and reliable verification. Unlike 1D barcodes, 2D codes like Data Matrix codes store data horizontally and vertically, holding more information in less space while being readable from multiple angles. Barcode verifiers further ensure quality by checking readability against standards: If a barcode fails, there’s a good chance you’re looking at a fake.  

Unfortunately, barcodes alone aren't enough. Counterfeiters have become more sophisticated, figuring out how to easily copy or tamper with visible barcodes. That’s why many industries are turning to covert or “invisible” barcodes for an extra layer of security.

Covert barcodes, often Data Matrix codes, are used for various purposes, including aesthetics, brand authentication, security, supply chain tracking, and more. By staying out of sight, they protect against counterfeiting and fraud.

The advantages include:

• Authenticity: invisible codes serve as a hard-to-counterfeit proof of authenticity, such as batch and lot control data embedded in invisible matrix codes.
• Aesthetics: covert barcodes maintain a product’s design by staying hidden, great for small packaging or premium products. They provide essential tracking data without disrupting the package’s appearance. Critical info like QA results, serial numbers, and supply chain data are included.
• Privacy: certain barcodes, like ones on time cards or individual records, contain information that should link to a specific item.
• Protection: Data Matrix codes are difficult to replicate using methods like photocopying, adding an extra layer of protection.
• Flexibility: invisible markings can be placed in many locations on packaging, making it easy for scanners to accurately read the code from any orientation – useful in fast-paced environments.
• Critical information: codes store important data, including quality assurance (QA) results, serial numbers, warning labels, and supply chain tracking info.
• Compliance: When recalls or product issues occur, codes can be scanned to verify compliance with standards or requirements.

Creating covert barcodes: inks and printing methods

Covert barcodes use advanced printing techniques to remain unseen until revealed by specific illumination or magnification – unlocking new levels of security. Often printed with fluorescent inks, they become detectable under specific scanners or light sources, glowing at precise wavelengths under ultraviolet (UV) or infrared (IR) light. This fluorescence comes in many colors and improves barcode readability. It’s especially effective on reflective or colored surfaces by enhancing contrast for the scanner. Covert inks can be applied using standard printing methods, such as inkjet or thermal transfer - no need for specialized equipment.

While UV-fluorescing inks are the most commonly used method, other special inks fluoresce only in a narrow band – making them harder to detect under typical conditions. This makes it difficult for unauthorized parties to replicate or tamper with the code.

Additional options for secure covert barcodes that protect against counterfeiting include:

• Laser etching uses a laser to etch barcodes onto products.
• Microprinting involves miniature text or barcodes.
• Color-shifting inks change color based on the angle of light.
• Chemical-reactive inks interact with certain chemicals or solvents to reveal the barcode.
• Embossing or debossing creates raised or indented barcodes on products.

Keep in mind, covert barcodes are only effective if they are easily read and reliably verified – pulling their weight in the fight against counterfeiting.

How covert barcodes work

1D barcodes are not ideal for covert printing due to their unpredictable fluorescence, which can vary across different parts of the barcode. But 2D Data Matrix codes are a more suitable option:

• Uses a smaller, more compact region with robust error-correction features.
• Easier to print covertly while maintaining reliability.

Special devices must read covert codes, using UV or IR lighting to reveal them before decoding. For example, a modular mobile terminal, with a UV light module and lens filter, can turn a smartphone into a covert barcode reader - illuminating and quickly scanning the code.

Advanced barcode scanners build on this capability by detecting hidden codes and cross-referencing supply chain data to verify authenticity. They can link to transaction histories, providing details about the manufacturer, retailer, and purchase location. By identifying discrepancies such as tampering or duplication, these scanners offer the protection and accuracy that standard scanners might lack.

As barcodes evolve from simple tracking tools to powerful protectors, covert technology is exposing fakes in plain sight. With the right printing technology and barcode verifier, you can take advantage of invisible barcodes to protect your products and your brand. By implementing these covert solutions, you help ensure authentic goods reach your customers and strengthen your defense against counterfeiting.