A new method of combating counterfeit products has been created by scientists – nano-optical technology. This new technology is a combination of tiny particles of gold, silver and other metals and nanotechnology. The particles are combined to create microscopic optical tags that contain information about the product, such as its origin, manufacturer, date of production, and other important details. These tags are then attached to the product, making it more difficult for counterfeiters to replicate the product and make it appear genuine. The information stored in the tag is invisible to the naked eye, but can be scanned using a specific device. This makes it a powerful tool for authentication and security.

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source: Phys.org