These days, it seems like you need a password to gain entry into just about everything, and for good reason.
Passwords are the oldest, most mature and most flexible security tool around.
Yet they're also the most often breached, though not because of inherent conceptual or technological weaknesses. Despite years of experience, few people keep their passwords secure, and few companies enforce policies that require them to do so. Much like the lock on a front door, however, passwords always will be an attacker's first target. As long as they remain insecure, any other defensive measures are essentially useless. Usually, the easiest way to get someone's password is simply to ask for it.