TruTag microtags are inert, edible, and can integrate into the fabric of a product without packaging or labels for the authentication of food, drugs, electronics, consumer products, and industrial components. Millions of optical patterns can be embedded into a TruTag, a dust-sized particle smaller than the width of a human hair. This security platform will help prevent counterfeiting, enhance the safety of food and medicine, improve tracking and logistics, ensure product quality and enable the Internet of Things.