1. In a communications system or network, the protection given to information to conceal it from unauthorized persons having access to the system or network at large. Synonym segregation. 2. In a communications system, protection given to unclassified information, such as radio transmissions of law enforcement personnel, that requires safeguarding from unauthorized persons. 3. In a communications system, the protection given to prevent unauthorized disclosure of the information in the system. Note 1: The required protection may be accomplished by various means, such as by communications security measures and by directives to operating personnel. Note 2: The limited protection given certain voice and data transmissions by commercial crypto equipment is sufficient to deter a casual listener, but cannot withstand a competent cryptanalytic attack. 4. The right of individuals to control or influence what information related to them may be collected and stored and by whom and to whom that information may be disclosed. NOTE - because this term relates to the right of individuals, ii cannot be very precise and its use should be avoided except as a motivation for requiring security.