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 ...

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 ...

People have always wanted to communicate privately. There once was a time when regular ink was secret enough, because not much of the world knew how to read. Then literacy ruined it for everyone, and ...

Which invisible ink pens are best? Spies and conspirators have used invisible inks for millennia to send messages. In the modern age, invisible ink pens are an excellent way for grown-ups to ...

Chinese scientists have created an invisible ink to keep precious information out of unwanted hands. The water-based system can be printed in seconds and, after it has been read under ultraviolet ...

At one point, 24-year-old Chris Miller was pre-med. Although he changed his mind about being a doctor, he hasn't regretted his choice of low-key tattoos. The black, nickel-sized art at each wrist can ...

Scientists have invented sophisticated fluorescent inks that one day could be used as multicolored barcodes for consumers to authenticate products often counterfeited. Snap a photo with your ...

It may sound like something used by one of Harry Potter’s wayward classmates at Hogwarts, but “invisible ink” has now been revealed by the university ombudsman as the latest university exam scam.

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 ...