"The security features of ACF2/MVS were evaluated against the requirements specified by the DoD Trusted Computer System Evaluation Criteria dated 15 August 1983 and found to satisfy all the requirements of evaluation class C2. The Department of Defense Computer Security Center (DoDCSC) was established in January 1981 to encourage the widespread availability of trusted computer systems for use by facilities processing classified or other sensitive data. In the first quarter of FY83, SKK Inc. requested that the DoDCSC evaluate their commercially available product, the Access Control Facility 2 (ACF2) Release 3.1.3 for IBM's 0S/VS2 MVS [Multiple Virtual Storage] operating system. MVS is an IBM operating system for IBM's 303x, 308x, 4341, 370/158, and 370/168 processors."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/