This object holds the actual encryption key, 16 or 32 bytes depending on the selected rdEncryptAlgo (AES-128 or AES-256), used to protect this radio link's traffic. An admin sets this key manually when rdEncryptKeyMode is manualEnteredKey, matching the same value at both ends of the microwave hop so encrypted frames can be decrypted correctly. Because it is security-sensitive, this object typically reads back as a masked or zeroed value rather than the true key contents.