Multilevel security in a distributed object-oriented system

Vijay Varadharajan*, Stewart Black

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


It is often suggested that distributed computing will be the major trend in computer systems during the next decade. However, distributed systems are vulnerable to a number of security attacks. In this paper we look at the security problems of object-based distributed systems, and propose a model based on labelling for multilevel security. The purpose of this model is to preserve the information flow security in a distributed object-oriented system. We consider the basic concepts of processing objects, and also the security threats to such systems. We postulate various modelling possibilities, and produce a specific set of security properties which describe a multilevel secure object model. This particular model demonstrates how various modelling decisions are reflected in an actual model.

Original languageEnglish
Pages (from-to)51-68
Number of pages18
JournalComputers and Security
Issue number1
Publication statusPublished - 1991
Externally publishedYes


  • Distributed systems
  • Information flow
  • Multilevel security
  • Object model

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