User+ID+and+Passwords

==User ID's and Passwords==

User ID's and passwords are used by programmes or websites to restrict people from using their services or viewing their information. Many schools give their students a user name and let them choose a password. Each user must enter their unique username and password in order to log on and access the protected information.

The idea of the user ID is to know who and when someone is logged on. Different users may have different access levels, restricting the user to change or edit files or settings on the computer or network. User may only be allowed to view files while others may copy and/or delete files. Access levels can also restrict the installation of software by users. For example on this wiki I can edit and delete pages. But I cannot invite people, only the organiser can.

The purpose of a password is to prevent people from logging in with someone elses user ID. The use of a password is therefore to make sure that only one person can log on per user ID. A password is a set of secret numbers and/or letters which match with a username to grant access. A strong password should contain both letters and numbers and should be chosen at random. "Xf5r4723hj" would be much better than //"//Dylan" for example.