Security modes are a way of making sure that sensitive data stays safe. They help to prevent hackers from gaining access to sensitive information or doing something bad to your computer. Security modes involve setting up rules that everyone must follow when sending or receiving data. For example, if you have a password, you should make sure it is very strong so hackers can't guess it. Another example is that you should make sure any websites you visit are secure and have encryption so that the data stays safe while it is traveling through the internet.