Each person tries to protect his privacy, protecting, among others, his personal data.This is also done by companies that contain more information about their employees or contractors. How to protect yourself against identity theft or loss of data in a company. The current operating systems of our phones and computers are constantly being improved so that they become more and more secure. Unfortunately, our threats are available and the services available from the devices is very small. Understanding the danger by showing us what can happen is the key. The greater the number of users, the safer we are. This is because our data is constantly used and handled, is transferred by unauthorized persons, is limited, they only ask when and how we will react.