How do you prevent users from getting confused with multiple login options?

1. How do I restrict multiple logins?
2. How to prevent multiple login for same user in Java?
3. What is the reason that users should log on with a username and password?

How do I restrict multiple logins?

To prevent the user from login on multiple systems or web browsers you need to generate a token on each successful login attempt. Need to check the token on each page. If the token does not match then destroy the SESSION and log out the user.

How to prevent multiple login for same user in Java?

Easiest way is to let the User have a static Map<User, HttpSession> variable and let it implement HttpSessionBindingListener (and Object#equals() and Object#hashCode() ). User user = userDAO. find(username, password); if (user != null) request.

What is the reason that users should log on with a username and password?

Passwords provide the first line of defense against unauthorized access to your computer and personal information. The stronger your password, the more protected your computer will be from hackers and malicious software.