A security researcher claims to have discovered a way to hide extra information inside emoji.

How a simple line drawing of a smiley face became a global shorthand for brands to connect ... which aimed to demonstrate how these playful icons could help us capture our emotions through text.

A smiley face icon clearly indicates when placed in the proper range. The data is displayed quickly, and a visual countdown and a beep let to know when the reading is done. It’s a ...