Final answer:
An Authentication Key is used to verify identity, while a Data Encryption Key is used to secure and encrypt data.
Step-by-step explanation:
Authentication Key: An Authentication Key is used to verify the identity of a user, device, or system. It is used in processes like logging into an account or accessing a secure network. For example, when you enter a password to log into your email account, the password acts as an authentication key to verify your identity.
Data Encryption Key: A Data Encryption Key is used to encrypt and decrypt data. It ensures that data is secure and cannot be accessed by unauthorized parties. For example, when you send a message over an encrypted messaging platform, the data encryption key is used to encrypt the message so that only the intended recipient can decrypt and read it.