Security With Captcha As Passwords
The captcha application can be checked out here http://sudoku-project.byethost17.com/color-sudoku-project/register.php?i=1 http://sudoku-project.byethost17.com/sudoku-project/register.php?i=1 http://sudoku-project.byethost17.com/tetris-project/register.php?i=1