A consideration of the modes of operation for secure systems

  • C. L. Robinson
  • S. R. Wiseman
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 875)


Secure systems are often characterised by a ‘mode of operation’. This acts as a shorthand for the degree of risk to the information on the system and the minimum security functionality required as a countermeasure. This paper examines the UK definitions of these modes and proposes a model of a system which can be used to capture the distinctions between them. The variations of possible secure system functionality within each mode are then discussed. Some new definitions, which are orthogonal to the modes of operation, are proposed which can be used to resolve ambiguities.


Security Mode of Operation Dedicated System High Compartmented Multi-Level System Model Z Notation 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • C. L. Robinson
    • 1
  • S. R. Wiseman
    • 1
  1. 1.Secure Information Systems GroupDefence Research AgencyMalvernUK

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