Sometimes it is important to password your files whether it is because there is sensitive information in them that you need to email or because you want to save them securely on your computer. There are a number of ways to do this.
One way is to zip the files using software such as 7-zip or winzip this gives you the option upon zipping to encrypt the files with a password. Not only does it reduce the size of the files it also securely protects them. The only way to unzip the files is to use the password. It is therefore important that you make a note of this password. If you are sharing the files with other people then make sure the password is sent separately and ideally by a different method.
If you are using Microsoft Office products you can password protect the document within the software this can be to open the file and also to allow the user to edit it. This means that someone can open the file but not make any edits to it without knowing the password to be able to edit the document.
Always make sure that the password is a strong and not easy to guess and don’t share with anyone unless absolutely necessary. Also when storing passwords make sure they are secure and not easy for people to access.