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Accession Number ADA587115
Title Purpose Restrictions on Information Use.
Publication Date Jun 2013
Media Count 18p
Personal Author A. Datta J. M. Wing M. C. Tschantz
Abstract Privacy policies in sectors as diverse as Web services, finance and healthcare often place restrictions on the purposes for which a governed entity may use personal information. Thus, automated methods for enforcing privacy policies require a semantics of purpose restrictions to determine whether a governed agent used information for a purpose. We provide such a semantics using a formalism based on planning. We model planning using Partially Observable Markov Decision Processes (POMDPs), which supports an explicit model of information. We argue that information use is for a purpose if and only if the information is used while planning to optimize the satisfaction of that purpose under the POMDP model. We determine information use by simulating ignorance of the information prohibited by the purpose restriction, which we relate to noninterference. We use this semantics to develop a sound audit algorithm to automate the enforcement of purpose restrictions.
Keywords Algorithms
Auditing
Automation
Decision making
Finance
Markov processes
Pomdp(Partially observable markov decision processes)
Semantics

 
Source Agency Non Paid ADAS
NTIS Subject Category 70B - Management Practice
92D - Education, Law, & Humanities
72F - Statistical Analysis
Corporate Author Carnegie-Mellon Univ., Pittsburgh, PA. CYLAB.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1405
Contract Number DAAD19-02-1-0389 W911NF-09-1-0273

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