American Telephone and Telegraph System V/MLS Release 1.1.2 Running on Unix System V Release 3.1.1

The security protection provided by the AT&T System V/MLS(System V/ MLS) operating system, configured as described in the Trusted Facility Manual, when running on the AT&T 3B2/500 or 3B2/600 mini computers, has been evaluated by the National Computer Security Center (NCSC). The security feat...

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Bibliographic Details
Main Authors: Bielat, Karen M, Crescenzi, Caralyn A, Gabriele, Mark D, Havener, William N, Kass, Sharon G, Traxler, Holly M
Format: Report
Language:English
Subjects:
ACCESS
Computer Systems Management and Standards
COMPUTERS
CONTROL
DATA PROCESSING SECURITY
FACILITIES
LABELS
MANUAL OPERATION
NATIONAL SECURITY
OPERATING SYSTEMS(COMPUTERS)
PROTECTION
REQUIREMENTS
SECURITY
SENSITIVITY
SYSTEMS ANALYSIS
TELEGRAPH SYSTEMS
TELEPHONE SYSTEMS
TIME SHARING
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Summary:The security protection provided by the AT&T System V/MLS(System V/ MLS) operating system, configured as described in the Trusted Facility Manual, when running on the AT&T 3B2/500 or 3B2/600 mini computers, has been evaluated by the National Computer Security Center (NCSC). The security features of System V/MLS were examined against the requirements specified by the DoD Trusted Computer System Evaluation Criteria (the Criteria or TCSEC) dated 26 December 1985 in order to establish a TCSEC rating. The NCSC evaluation team has determined that the highest class at which System V/MLS satisfies all the specified requirements of the Criteria is class B1. Therefore System V/MLS, when configured in the manner described in the Trusted Facility Manual, has been assigned a class B1 rating. A system that has been rated as being a B1 class system provides a Trusted Computing Base (TCB) that preserves the integrity of sensitivity labels and uses them to enforce a set of mandatory access control rules. The UNIX System V operating system is a general purpose time-sharing system. System V/MLS, an enhanced version of UNIX System V, was developed to meet the B1 Criteria while maintaining compatibility with UNIX System V. Library No. S233.121.