An Adaptive Policy for Improved Timeliness in Secure Database Systems

Abstract

Database systems for real-time applications must satisfy timing constraints associated with transactions, in addition to maintaining data consistency. In addition to real-time requirements, security is usually required in many applications. Multilevel security requirements introduce a new dimension to transaction processing in real-time database systems. In this paper, we argue that because of the complexities involved, trade-offs need to be made between security and timeliness. We first describe a secure two-phase locking protocol. The protocol is then modified to support an adaptive method of trading off security for timeliness, depending on the current state of the system. The performance of the Adaptive 2PL protocol is evaluated for a spectrum of security-factor values ranging from fully secure (1.0) right up to fully real-time (0.0).

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1995
Accession Number
ADA447651

Entities

People

  • Bhavani Thuraisingham
  • Rasikan David
  • Sang H. Son

Organizations

  • University of Virginia

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Bandwidth
  • Classification
  • Computations
  • Computer Programs
  • Computer Science
  • Computers
  • Corporations
  • Database Management Systems
  • Databases
  • Engineering
  • Multithreading
  • New York
  • Recovery
  • Saturation
  • Scheduling (Production)
  • Security
  • Simulations

Fields of Study

  • Computer science
  • Engineering

Readers

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  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Government and Public Administration Law.