Most Nancy Drew fans could tell you how to make invisible ink. But the CIA has still waited until now to lift the lid its 'secret writing' practices, revealed today in some of the oldest secret ...

Invisible ink is one of the most popular features on Apple's iOS 10 for iPhone and iPad, but it's still a little buggy. Invisible ink is a new feature that lets you send scrambled-looking texts and ...

My finger hovers over an iMessage obscured by a haze of dancing white dots. Before I tap to dissolve the sparkling pixels and reveal the contents of the message, I know it's going to be juicy, or at ...

Once iOS 10 officially launches on Sept. 13, we’ll have loads of new features to play with — including the new Bubble Effects in Messages, Apple’s text messaging app. I do have to say, though, that ...

Apple's latest operating system, iOS 10, has a ton of fun features which revolutionize texting on the iPhone. The most-talked-about feature is arguably invisible ink, which lets you send obscured ...

The following is an except from Prisoners, Lovers & Spies: The Story of Invisible Ink from Herodotus to al-Qaeda, by Kristie Macrakis, One of my favorite invisible-ink stories, that didn’t make the ...

The secret history of invisible ink. American Expeditionary Forces secret ink lab By signing up, you confirm that you are over the age of 16 and agree to receive occasional promotional offers for ...

For a long time, seeing those words pop up onscreen was the best indicator of good gossip to come. Close seconds included “OK, so…” for the more demure among us, or a simple teacup emoji for the ...

APPLE has tucked away a clever texting feature inside millions of iPhones. It's easy to miss these "invisible texts" – but they're so useful once you unlock them. Sending Invisible Ink messages is ...

The history of invisible ink veers wildly back and forth between high-tech methods and the humblest of approaches. In her book, Prisoners, Lovers, and Spies: The Story of Invisible Ink from Herodotus ...

Camilla Turner is The Sunday Telegraph's Political Editor. Her previous roles at The Telegraph include Chief Political Correspondent and Education Editor. As a news reporter, she travelled across ...