Electronic authentication is a way to check if someone is who they say they are when they are using a computer or an electronic device. It is like asking for a password when you want to use your phone or computer.
When you want to prove your identity, you have to give some information that only you know, like your password. This information is stored electronically in a special system, and when you enter the password, the system checks if it matches what it has stored.
Sometimes, electronic authentication also asks for other things like a fingerprint, an eye scan, or a special device like a security token. All of these things make it harder for someone else to pretend to be you, and protect your private information.
Think of electronic authentication like a secret handshake that only you and your computer know, so you can be sure that no one else can use your things without your permission.