Cracking open an Android app, changing something inside it, and repackaging it as if nothing happened used to take real skill. Reverse engineering an APK meant decompiling it, understanding unfamiliar code, making a change without breaking anything, then reassembling and signing the package correctl...

New homeowners love posting a photo holding up their keys the day they move in. A cybersecurity professional is warning that the habit might be handing strangers a working copy of the front door.

Evan Ottinger, a red team operator based in Virginia who spends his career simulating break-ins for co...