Suhail Qadir Mir1 and S.M.K. Quadri2
1
Post Graduate Department of computer sciences, University of Kashmir, India
2Department of Computer Science, Jamia Millia Islamia, India
ABSTRACT
The purpose of the paper is to present a metric for availability based on the design of the information
system. The availability metric proposed in this paper is twofold, based on the operating program and
network delay metric of the information system (For the local bound component composition the
availability metric is purely based on the software/operating program, for the remote bound component
composition the metric incorporates the delay metric of the network). The aim of the paper is to present a
quantitative availability metric derived from the component composition of an Information System, based
on the dependencies among the individual measurable components of the system. The metric is used for
measuring and evaluating availability of an information system from the security perspective, the
measurements may be done during the design phase or may also be done after the system is fully
functional. The work in the paper provides a platform for further research regarding the quantitative
security metric (based on the components of an information system i.e. user, hardware, operating
program and the network.) for an information system that addresses all the attributes of information and
network security.
Availability, Metric, Security, Dependency, Information System
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