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 ...

Fluorescent inks that are visible only under ultraviolet light are useful for data security and anticounterfeiting but are limited in their usefulness because anybody with a UV lamp can visualize the ...

Invisible inks based on “smart” fluorescent materials have been shining brightly (if only you could see them) in the data-encryption/decryption arena lately ...

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 ...

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 ...

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 ...