1. The quality of an information system (IS) reflecting the logical correctness and reliability of the operating system; the logical completeness of the hardware and software implementing the protection mechanisms; and the consistency of the data structures and occurrence of the stored data. Note that, in a formal security mode, integrity is interpreted more narrowly to mean protection against unauthorized modification or destruction of information. 2. The prevention of the unauthorized creation, amendment or deletion of information. 3. A security property of an object that prevents or is used to prevent: - its condition of existence being changed and/or - its contents being changed. This property is relative to some subject population and to some agreed degree of security. 4. See Data Integrity. 5. The prevention of the unauthorized modification of information without detection. . 6. The property that the existence of an object and/or its contents not be destroyed or altered by an unauthorized user. Also, the property that the contents of an object not be altered to unauthorized values.