India, July 15 -- In an era of concerns about privacy and protection of content, American digital designer Eric Lu has created what he calls Ghost Font. He went viral on Wednesday for creating the experimental typeface that hides text inside animated videos made of hundreds of moving dots. The dots forming each letter move in one direction, while the rest move the opposite way, making the message readable to humans but difficult for AI models to interpret.

Lu wrote on the font's website that he tested it with advanced AI models, including GPT-Sol 5.6 Ultra and Claude Fable, which failed to decode the hidden text, instead confidently identifying a decoy phrase planted to mislead them. A third model spent nearly 20 minutes analysing the cl...