For the sake of internet, people now have two worlds - real and virtual. In reality , people build houses and lock them for protection. The state employs security forces to protect its citizens. Similarly, in the virtual world or online security means password. This is the first step against cyber criminals. When the password goes to cyber criminals ; In the language of technology we call it 'hacking'. And knowing someone's password and using it invisibly is a kind of 'theft'. To prevent this theft, it is important to choose a different strong password for each important account on the web.