Real or counterfeit? Northwestern University scientists have invented sophisticated fluorescent inks that one day could be used as multicolored barcodes for consumers to authenticate products that are ...

Ina Sava Gallis shows a sample of an optical tag with the Sandia logo under an ultra violet light. (Photo by Craig Fritz) A high-tech invisible ink invented at Sandia National Laboratories could ...

Coded messages in invisible ink sound like something only found in espionage books, but in real life, they can have important security purposes. Yet, they can be cracked if their encryption is ...

(Nanowerk Spotlight) Counterfeiting of important documents like passports poses a serious and growing global security threat. Despite the use of various anti-counterfeiting technologies such as ...

(KERO) — People have seen it in spy movies, secret messages written through invisible ink. As it turns out, the average person may have all the ingredients needed to make their own invisible ink right ...

Researchers at the University of Michigan have developed a kind of electronic “invisible ink” that can help alert users to any unauthorized tampering with a device. When the chip is exposed to light ...