WhatsApp Chat Lock adds extra privacy by securing individual chats with fingerprint, Face ID, or PIN on Android and iPhone.

Using the Notes app on your iPhone as a messaging app is a surprisingly clever way to have a discreet conversation. You can use it to plan a surprise party for a loved one or disguise sensitive ...

A woman who became interested in coding as a child developed her own secret code, but did it so thoroughly she couldn't translate her own writing years later. Ellie, 22 and from Oregon, told Newsweek ...

Visual chaos: The alternative to the slow, stop-start process is clicking "Show All Notes" or "Show Comments" in the Review tab to keep them on-screen at all times. The moment you do this, you're ...

The 35-year-old saga of Kryptos, an enigmatic sculpture containing four encrypted messages outside the headquarters of the U.S. Central Intelligence Agency, recently took a bizarre twist.