http://www.cnr.it/ontology/cnr/individuo/prodotto/ID203603

Influence of Attribute Freshness on Decision Making in Usage Control (Contributo in atti di convegno)

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Influence of Attribute Freshness on Decision Making in Usage Control (Contributo in atti di convegno) (literal)

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[1] Krautsevich L., [1] Lazouski A., [1] Martinelli F., [1] Yautsiukhin A. (2011)
Influence of Attribute Freshness on Decision Making in Usage Control
in 6th Workshop on Security and Trust Management, Copenhagen (Denmark), 2011
(literal)

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[1] Krautsevich L., [1] Lazouski A., [1] Martinelli F., [1] Yautsiukhin A. (literal)

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Abstract

The usage control (UCON) model demands for continuous control over objects of a system. Access decisions are done several times within a usage session and are performed on the basis of mutable attributes. Values of attributes in modern highly-dynamic and distributed systems sometimes are not up-to-date, because attributes may be updated by several entities and reside outside the system domain. Thus, the access decisions about a usage session are made under uncertainties, while existing usage control approaches are based on the assumption that all attributes are up-to-date. In this paper we propose an approach which helps to make a rational access decision even if some uncertainty presents. The proposed approach uses the continuous-time Markov chains (CTMC) in order to compute the probability of unnoticed changes of attributes and risk analysis for making a decision. (literal)

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