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 ...

Turning the childhood invisible ink trick on its head, this mod from Make allows you to print out invisible messages with your inkjet printer. Matt Richardson put together this excellent video with ...

Invisible ink is back, and it’s better at hiding than ever. A new invisible ink that you can print is harder to reveal than most common cyphers. Liang Li at Shanghai Jiao Tong University in China and ...

Researchers at Northwestern University have developed a new kind of sophisticated invisible ink that they say can be used to create codes that would be nearly impossible for counterfeiters to ...

Researchers at Xerox have come up with a way to add fluorescent words and images to documents like checks, coupons, and transcripts using standard printers. The technique makes it possible to create ...

Geek Life: Fun stories, memes, humor and other random items at the intersection of tech, science, business and culture. SEE MORE by Alan Boyle on Jan 7, 2016 at 6:50 pm January 7, 2016 at 6:50 pm ...

Using inks created from artificial materials that exhibit properties not found in nature (aka metamaterials) and commercially-available inkjet printers, researchers at the University of Utah have ...

You might not be drafting bomb instructions on the back of a cocktail napkin in a German bar anytime soon, but being skilled with invisible inks could definitely pay off. Photo by Kristen D. While you ...

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 ...

Families who took vacations this summer might have relied on iPods and DVD players to keep the kids quiet in the backseat. Paul Collins, Weekend Edition literary detective, picked a decidedly low-tech ...