Combining Markov and Semi-Markov Modelling for Assessing Availability and Cybersecurity of Cloud and IoT Systems

This paper suggests a strategy (C5) for assessing cloud and IoT system (CIS) dependability, availability, and cybersecurity based on the continuous collection, comparison, choice, and combination of Markov and semi-Markov models (MMs and SMMs). It proposes the systematic building of an adequate and...

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Bibliographic Details
Published in:Cryptography 2022-09, Vol.6 (3), p.44
Main Authors: Kharchenko, Vyacheslav, Ponochovnyi, Yuriy, Ivanchenko, Oleg, Fesenko, Herman, Illiashenko, Oleg
Format: Article
Language:English
Subjects:
Algorithms
Analysis
Availability
cloud
Cloud computing
Cybersecurity
Data collection
Data security
Failure
Failure rates
Internet
Internet of Things
IoT
Maintenance
Markov analysis
Markov chains
Markov modelling
Markov processes
Mathematical models
Parameters
Privacy
Safety and security measures
semi-Markov modelling
Software
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Summary:This paper suggests a strategy (C5) for assessing cloud and IoT system (CIS) dependability, availability, and cybersecurity based on the continuous collection, comparison, choice, and combination of Markov and semi-Markov models (MMs and SMMs). It proposes the systematic building of an adequate and accurate model to evaluate CISs considering (1) continuous evolution of the model(s) together with systems induced by changes in the CIS or physical and cyber environment parameters; (2) the necessity of collecting data on faults, failures, vulnerabilities, cyber-attacks, privacy violations, and patches to obtain actual data for assessment; (3) renewing the model set based on analysis of CIS operation; (4) the possibility of choice and utilizing “off-the-shelf” models with understandable techniques for their development to assure improved accuracy of assessment; (5) renewing the models during application of CIS by time, component or mixed combining, taking into consideration different operation and maintenance events. The results obtained were algorithms for data collection and analysis, choice, and combining appropriate MM and SMMs and their different types, such as multi-fragmental and multiphase models, considering changing failure rates, cyber-attack parameters, periodical maintenance, etc. To provide and verify the approach, several private and public clouds and IoT systems were researched and discussed in the context of C5 and proposed algorithms.
ISSN:2410-387X
2410-387X
DOI:10.3390/cryptography6030044