Accession Number : ADA251361

Title :   The Sword Multilevel Secure DBMS,

Corporate Author : ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (UNITED KINGDOM)

Personal Author(s) : Wood, A. W. ; Lewis, S. R. ; Wiseman, S. R.

Report Date : FEB 1992

Pagination or Media Count : 24

Abstract : SWORD is a multilevel secure relational database management system. It adopts the 'Insert Low' approach to the provision of confidentiality controls, rather than the more commonly adopted technique of 'Polyinstantiation'. This allows SWORD to enforce confidentiality and elementary integrity constraints, such as uniqueness. Special techniques allow a multilevel SWORD database to be created and maintained by untrusted database clients working at a single level. In particular, 'Place Holders' allow fields to be created so that the classification of the field's contents dominates the classification of its existence. The report presents an informal description of SWORD and provides a general discussion of the issues. The reader should be familiar with the technical problems of providing multilevel computer security and some understanding of relational databases would be helpful.

Descriptors :   *DATA BASES, *DATA PROCESSING SECURITY, APPROACH, CLASSIFICATION, COMPUTERS, MANAGEMENT, SECURITY, GREAT BRITAIN.

Subject Categories : Computer Systems Management and Standards

Distribution Statement : APPROVED FOR PUBLIC RELEASE