Science & Engineering Research Support soCiety (SERSC)
Mostly user select password that is predictable. This happens with both graphical and text based passwords. Users tend to choose memorable password, unfortunately it means that the passwords tend to follow predictable patterns that are easier for attackers to guess. While the predictability problem can be solved by disallowing user choice and assigning passwords to users, this usually leads to usability issues since users cannot easily remember such random passwords. Numbers of graphical password systems have been developed; paper shows that text-based passwords suffer with both security and usability problems.