Access Control Systems: Security, Identity Management and by Messaoud Benantar

By Messaoud Benantar

Now not a lot to claim in this e-book other than that i discovered it incomplete and missing in useful approaches, extra studious than program orientated. i've got learn greater books at the topic just like the IAM good fortune information: quantity 1 which deals much more strategical details because it is extra of a advisor than a tutorial research.

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The key distinction between delegation and masquerading is that delegation implies the presence of two entities both of which are aware of one another and one is consenting that the other assumes its identity. Masquerading, on the other hand, happens when an entity assumes the identity of another entity without explicit or implicit consent. It represents a case of identity theft. The Axiom of Attenuation of Privileges Attenuation of privileges forms the basis under which access rights may propagate across the entities of a protection system [DENN76b].

Foundations of Security and Access Control in Computing Covert Channels These are any shared resources that are associated with hidden channels of transferring information and that are not deliberately designed for use as communication means. Covert Channels While storage and legitimate channels can be guarded against effectively, covert channels contribute a tremendous deal to the complexity of the confinement problem and can be very hard to uncover and remove. Covert channels are broadly classified into two categories: o Storage channels Information is communicated between two entities sharing a storage medium by way of having one entity write a data object, so that the other entity reads and interprets the data based on a conspiring protocol between the two entities.

A reference monitor is the TCB component of a computing system that mediates every access of a subject to a resource in accordance with a security policy that governs such access. The policy may be implemented in the form of rules and attributes associated with a registry of subjects and a registry of objects. The rules can be static access rights (permissions), roles, or dynamically deduced rights. 6 illustrates the concept of an accesscontrol reference monitor. In addition to the mediation of access, a reference monitor should not be bypassed at all times, should support isolation of the security services from un-trusted processes, maintain system integrity, and prevent from tampering by users or system processes.

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