to achieve secure optical communications , a messaging encoding scheme is utilized in which optical communication signals are encoded based upon a known unique code . this encoding methodology allows for the broad transmission across an optical network which will include intended destination . only the intended destination or destinations will include the necessary unique codes to allow recognition and decoding of the optically encoded message . by providing security in this optical encoding manner , the need for additional message overhead and / or additional systems is thus avoided , thereby providing efficient communication in a secure manner .