Stephanie is known as a "white hat" hacker, meaning she's an ethical hacker. She is one of the good guys who helps others protect their information by showing them their weaknesses.

Major companies — including Fortune 100 members — will hire Stephanie to conduct different types of phishing campaigns and physical security penetration against their company. She carries out these hacking attempts to show her clients where they need to improve their security to avoid being the victim of a true criminal — or "black hat" — hacker.

Stephanie's area of expertise is social engineering, which is an increasing area of concern since social media is so popular — and it exposes a huge amount of personal information.

Frankly, there is no better person to share the secrets of hackers than one of them. Here are Stephanie's top three suggestions to help you stay safe.