Authenticated encryption is a way of making sure that data is kept safe and secure. It is like a lock and key that can't be opened unless you have the right key. Authenticated encryption works by taking the data that you want to keep safe, scrambling (or encrypting) it with a secret code, and then adding another code (or authentication tag) that only someone with the same secret code can create. This makes it so that only someone who knows the secret code can decrypt the data and verify that it is the same as it was before it was encrypted.