If you wanted to assess whether your home was secure, you’d look at it from the point of view of criminals: where are the unlocked windows? How easily can the door be broken? When are people home? The same principle applies for mobile application security. Penetration testing is an authorized, legal process through which security experts attempt to break into an app to identify and correct points of security weakness. Sometimes called a pen test, penetration testing offers the most comprehensive security assessment possible, by looking at your application from a new perspective.