Password Schemes
  Managing passwords is such a difficult thing.  Although, systems have sprung for single signon, they have not been  used to their fullest value; they are either not implemented, are  segregated, i.e. there are many single sign ones, or simply because  users don't want to link their different accounts together.  In reality, now a days, almost everyone using computers, have to manage multiple passwords.  There have been many passwords choice tips:   Use strong passwords          Don't use dictionary words  Don't use names in the family  Don't use dates common to your family    Don't use the same password or multiple systems   Most of the systems suggest to use strong passwords, some even do not  accept simple password not meeting their password complexity  requirements.  But this all makes the problem of remembering passwords really hard.  People tend to forget which password is for which system. They try to  guess and a number of tries later they click the "fo...