Data Security Implications of an Extended Subschema Concept.
Abstract
Modern data base system architectures, such as those based on the CODASYL Data Base Task Group (DBTG) specifications, stress the idea that users of the system should interact with a logical description of that portion of the data base with which they are concerned, called a subschema, which is derived from a logical description of the data base as a whole, called a schema. One of the benefits of this architecture is its ability to provide enhanced data security, since the mapping from schema to subschema may conceal information from the user. Use of this architecture to enhance data security was studied with respect to schema, subschema, and design and implementation of application programs. Instances of such use include both that in the existing DBTG specifications and some proposed extensions to that architecture.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1975
- Accession Number
- ADA013248
Entities
People
- Frank A. Manola
- Stanley H. Wilson
Organizations
- United States Naval Research Laboratory