[dropcap font=”0″]T[/dropcap]raditionally, a password is a secret word or phrase that one needs to know in order to be allowed into a place. For some time, people have been using passwords to enter a secret place where not everyone is allowed to come in. In the past, those who did not need to go to such places were not required to worry about passwords and there were only a few people who needed passwords. Now, passwords have come into everyone’s life as early as their teens since they come to use computers, smartphones and other various electronic devices where their personal data are stored. In addition, they have to keep complicated passwords for their email and social media sites accounts Facebook, Twitter, Linkedin, and so on or they have to keep passwords for their internet bank accounts and ATM cards. As a result, people have to worry about their passwords being forgotten or stolen or hacked as they can lose access to their devices or accounts or their personal data or money can be stolen. Such worries have led to the use of finger prints which was applied for illiterate people in the past. Now, the finger print identification method is available on some electronic devices. Other places where passwords are required may follow suit sooner or later. This time, finger print experts are not needed and the identification can be conducted more easily and accurately due to advanced electronic technology. It can be seen from the phenomenon that people have to repeat something they did in the past but it is not in the same way as in the past.