Researchers have developed a rewriteable paper coating that can encrypt secret information with relatively low-tech invisible ink -- water. A message printed out by a water-jet printer on a ...

Add Yahoo as a preferred source to see more of our stories on Google. People have seen it in spy movies, secret messages written through invisible ink. As it turns out, the average person may have all ...

eWeek content and product recommendations are editorially independent. We may make money when you click on links to our partners. Learn More Xerox said on Wednesday that its scientists have perfected ...

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 ...

(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 ...