Warning: pg_query(): Query failed: ERROR: missing chunk number 0 for toast value 29512337 in pg_toast_2619 in /dati/webiit-old/includes/database.pgsql.inc on line 138 Warning: ERROR: missing chunk number 0 for toast value 29512337 in pg_toast_2619 query: SELECT data, created, headers, expire, serialized FROM cache_page WHERE cid = 'https://www-old.iit.cnr.it/node/12209' in /dati/webiit-old/includes/database.pgsql.inc on line 159 Warning: pg_query(): Query failed: ERROR: missing chunk number 0 for toast value 29512337 in pg_toast_2619 in /dati/webiit-old/includes/database.pgsql.inc on line 138 Warning: ERROR: missing chunk number 0 for toast value 29512337 in pg_toast_2619 query: SELECT data, created, headers, expire, serialized FROM cache_page WHERE cid = 'https://www-old.iit.cnr.it/node/12209' in /dati/webiit-old/includes/database.pgsql.inc on line 159 Influence of Attribute Freshness on Decision Making in Usage Control | IIT - CNR - Istituto di Informatica e Telematica
IIT Home Page CNR Home Page

Influence of Attribute Freshness on Decision Making in Usage Control

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.


6th Workshop on Security and Trust Management , Copenhagen , 2011

Autori IIT:

Leanid Krautsevich

Foto di Leanid Krautsevich

Aliaksandr Lazouski

Foto di Aliaksandr Lazouski

Tipo: Articolo in Atti di convegno internazionale
Area di disciplina: Information Technology and Communication Systems

File: Influence_of_Attribute.pdf