What is the Weakness to Password and Username? How can we prevent unauthorized poeple to get access to your account. How can we secure it? Well Password and Username is an old verify identity of an user account. Only the person so are the owner of the account have the password but is it really safe? There i all the time weakness in all kinda systems. There are many threats so can be used to attack this kinda account system to gain access. If the password isn't encrypted this is a very big risk since people can gain unauthorized access with just sniffing around in the network. So you should have all the password encrypted on the system. Another risk with password and username is that when they if the passwords is weak its can be very easy to crack it. How can i avoid that? Well make a strong password. Strong Password is from 8 - 16 characters long. As everyone know a Brute Force Attack wont stop before it have the right password. So how can we get protected against this kinda attack? Well lets say you have 5 tryes to log into the account. If you have gone over that limte the account will be locked down or you must wait like 1 hour befor you can try again. This is the best protection against Cracking attacks. When you are ect going to secure a School Network there is alot of things you should think about. Ect you should make it like a rule that after 3 weeks everyone must choose a new password. Since its may be a lot of password so other poeple may get access to so they can log into other accounts. Also you should lock down important Functions on the system so Normal users shouldn't have access to like "Command Prompt", and other stuffs so can be used to do things they shouldn't do. You should set up limited account to every student so they haven't access to the whole computer. You should also limited to use of the Internet. Lets say they only have access to specific internet pages they may go to. Also block sites like Games and stuff. Also its very important to monitor where they are going on the Internet and what they are doing. So may be it will be smart to install Keylogger on every computer. If people are doing something wrong on the computer you should lock them away from the computer for a while. Just so they know that you are the boss lol. :p What is Encryption? This is an Techniques so is used to secure Sensitive Informations so you don't want to go in the wrong hands. Important information is etc. "Password" and "Usernames" If they are encrypted no one can read them without access to read them. Lets say you must in Administrator account to read the Encrypted files. This is very good way to prevent Sniffing attacks.