NDLI: Cue: a framework for generating meaningful feedback in XACML

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Cue: a framework for generating meaningful feedback in XACML

Content Provider	ACM Digital Library
Author	Nigam, Prateek Ghai, Sunil Kumar Kumaraguru, Ponnurangam
Abstract	With a number of access rules at play along with contexts in which they may or may not apply, it is not always obvious to the legitimate user what caused an authorization server to deny a request, neither is it possible for the administrator to specify a complete fail proof policy. It then becomes the responsibility of the system to act in a user friendly manner by providing feedback suggesting the requester about possible alternatives. The system should also cover any unhandled request that it may encounter due to an incomplete system policy. At the same time, it is essential for feedback to not reveal the entire policy to any user. In this paper we propose a framework Cue, for generating feedback in XACML using logic programming in Prolog. Feedback content is protected by the use of meta policy which itself is specified in XACML. We first translate XACML policies into logic based functors. Second, we execute a query using parameters in the denied XACML request, to identify conditions that failed. Third, the failed condition is notified as feedback if a meta policy allows the system to reveal it. Cue is capable of generating appropriate feedback while ensuring that a desired degree of confidentiality is maintained.
Starting Page	9
Ending Page	16
Page Count	8
File Format	PDF
ISBN	9781450300933
DOI	10.1145/1866898.1866901
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2010-10-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Access control Feedback Prolog Privacy policy languages Xacml Policy protection Usable privacy and security
Content Type	Text
Resource Type	Article

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