Most password managers are secure, but one common vulnerability makes it possible for hackers to steal your data anyway.

By harnessing quantum dots and inventive protocols, researchers have cracked a decades-old challenge in quantum encryption, showing secure communication can work without perfect hardware.

The latest example of the runaway hype that can come from such pitches is research published today by SquareX, a startup selling services for securing browsers and other client-side applications. It ...