NDLI: Security analysis of SITAR intrusion tolerance system

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Security analysis of SITAR intrusion tolerance system

Content Provider	ACM Digital Library
Author	Madan, Bharat B. Wang, Dazhi Trivedi, Kishor S.
Abstract	Security is an important QoS attribute for characterizing intrusion tolerant computing systems. Frequently however, the security of computing systems is assessed in a qualitative manner based on the presence and absence of certain functional characteristics and security mechanisms. Such a characterization is not only ad hoc, it also lacks rigorous scientific and systematic basis. Some recent research efforts have emphasized the need for a quantitative assessment of security attributes for intrusion tolerant systems. Intrusion tolerant systems are not only complex, but also have to operate in an environment made unpredictable due to the unpredictable actions of bona-fide and non bona-fide users. This makes quantitative security analysis a difficult problem. Earlier approaches to security modelling have been based on the use of Markov models. Capturing details of real architectures in a manually constructed Markov model is difficult. We advocate the use of higher level formalism based on stochastic Petri nets for modelling and quantitative security analysis of intrusion tolerant systems. To validate our approach, we use an experimental intrusion tolerant systems known as the SITAR (scalable intrusion tolerant architecture) currently being implemented jointly at MCNC and Duke University as our target system. It is shown that the resulting analysis is useful in determining gains in security by reconfiguring such a system in terms of increase in redundancy under varying threat levels.
Starting Page	23
Ending Page	32
Page Count	10
File Format	PDF
ISBN	1581137842
DOI	10.1145/1036921.1036924
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2003-10-31
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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