Verfication of access compliance of subjects with objects in a data processing system with a security policy

摘要

The invention relates to access rules (R) of compliance of subjects (Su) with objects (Ob) with a predetermined security policy (PS) in a data processing system such as a chip card. Each access rule defines the right of a subject to carry out an action on an object The security policy defines the security rules (RS) for access of the subjects to the objects. For an operation relating to a given object (Ob), at least one access rule relating to the given object is compared with the security rules in order to accept the operation when the access rule is in compliance with all the security rules; if this is not the case, the operation is refused. An operation can be the loading of an object such as an application, a modification of the access rules, or deletion or addition of a subject (s) or a request for access to a given object by a subject or a group of subjects.