The idea may sound like something out of a science fiction novel, but it’s actually a reality being developed by the Defense Advanced Research Projects Agency (DARPA). The agency’s new program, called the Bio-Replicable Adaptive Concrete Enhancements (BRACE) program, aims to revolutionize the way the Department of Defense (DoD) approaches …

Steganography is the art of concealing a message or information within another seemingly innocent message. The word “steganography” comes from the Greek words “steganos,” meaning “covered,” and “graphein,” meaning “to write.” In other words, steganography is the art of hiding a message in plain sight. Steganography differs from cryptography because …