American Telephone and Telegraph System V/MLS Release 1.1.2 Running on Unix System V Release 3.1.1
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 18, 1989
- Accession Number
- ADA234055
Entities
People
- Caralyn A. Crescenzi
- Holly M. Traxler
- Karen M. Bielat
- Mark D. Gabriele
- Sharon G. Kass
- William N. Havener