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Since years organisations classify information according to security schemes and various criteria. The requirement to protect information characterised by a hierarchy of sensitivity levels led to the definition of multilevel security. Multilevel security represents one of the toughest problems that security engineers are still facing, due to the fact that it is difficult to manage securely information at different classification levels on the same electronic device or network. It concerns wireddoi:10.1504/ijmndi.2017.082802 fatcat:jihunjqyr5fotmvsymol4j5u3e