Most of the solution do have flaws. The solution that is used most often, is to do nothing. Passwords are used to lock an accidental intruder out of a file or system. Passwords work only if the user keeps it a secret. Many computer owners do not realize that hackers will find the password, even if the owners throw away the paper the password is written on.
Hackers can get a password by a user's mistake.
For instance, leaving the code on the screen or writing it down on a piece of paper will allow a hacker to get access to the password. The administration did not want students to access files they were not allowed into. Therefore, they needed a security system. It works when the identity of the user has been proven accessible. If the user is inaccessible the system will not allow the user into the file.