William Abel, a mail censor at Iowa's State Prison, Fort Madison, using a hot iron to bring out a secret message written in lemon juice on a letter.Three Lions/Getty Images Humans have had a long ...

Do you ever feel like someone is peering over your shoulder while sending private messages to your friends and family? Well, you won't have to worry about those nosy people knowing what you're sending ...

Engineering requires deep attention to detail, but sometimes engineers take it a step further by adding secret, playful ...

PHOENIX — It was more than a month ago that ABC15 exposed outgoing Phoenix Police Chief Jeri Williams and her top brass had used the secret messaging app Signal to discuss sensitive department matters ...

A Hillhouse student’s eyes widened as he applied grape juice and heat to what appeared to be a blank piece of paper — but instead held a secret message in invisible ink, written as part of a course ...

Advancements in artificial intelligence (AI), especially large language models (LLMs) like ChatGPT and open-source counterparts, are reshaping how people communicate daily. These AI systems generate ...

The Department of Homeland Security's internal watchdog and its general counsel have some disagreements about who is to blame for delays in providing Congress with Secret Service records related to ...