Key Escrow is primarily intended to ensure that encrypted data can be decrypted if the user's private key is lost or the user is unavailable. By storing a copy of the key with a trusted third party, encrypted data is not rendered permanently inaccessible. This demonstrates the concept of availability as part of the CIA triad. It's important to note that while Key Escrow can be seen as a way to enhance availability, it is not used for enhancing the security of the keys themselves, since adding more parties to the storage of the keys potentially increases risk.