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Preventing information inference in access control 15

Preventing information inference in access control

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20th acm symposium on access control models and technologies, sacmat 2015

作者： Paci, Federica Zannone, Nicola University of Southampton United Kingdom Eindhoven University of Technology Netherlands

ISBN: (纸本)9781450335560

Technological innovations like social networks, personal devices and cloud computing, allow users to share and store online a huge amount of personal data. Sharing personal data online raises significant privacy concerns for users, who feel that they do not have full control over their data. A solution often proposed to alleviate users' privacy concerns is to let them specify access control policies that reflect their privacy constraints. However, existing approaches to access control often produce policies which either are too restrictive or allow the leakage of sensitive information. In this paper, we present a novel access control model that reduces the risk of information leakage. The model relies on a data model which encodes the domain knowledge along with the semantic relations between data. We illustrate how the access control model and the reasoning over the data model can be automatically translated in XacmL. We evaluate and compare our model with existing access control models with respect to its effectiveness in preventing leakage of sensitive information and efficiency in authoring policies. The evaluation shows that the proposed model allows the definition of effective access control policies that mitigate the risks of inference of sensitive data while reducing users' effort in policy authoring compared to existing models. © Copyright 2015 acm.

关键词： Semantics

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Content-based information protection and release in NATO operations 13

Content-based information protection and release in NATO ope...

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18th acm symposium on access control models and technologies, sacmat 2013

作者： Armando, Alessandro Grasso, Matteo Oudkerk, Sander Ranise, Silvio Wrona, Konrad DIBRIS U. of Genova Italy Security and Trust Unit FBK-Irst Trento Italy Agent Sierra Consultancy Services Amsterdam Netherlands NATO Communications and Information Agency The Hague Netherlands

ISBN: (纸本)9781450319508

The successful operation of NATO missions requires effective and secure sharing of information among coalition partners and external organizations, while avoiding the disclosure of sensitive information to untrusted users. To resolve the conflict between confidentiality and availability, NATO is developing a new information sharing infrastructure, called Content-based Protection and Release. We describe the architecture of access control in NATO operations, which is designed to be easily built on top of available (service-oriented) infrastructures for identity and access control management. We then present a use case scenario drawn from the NATO Passive Missile Defence system for simulating the consequences of intercepting missile attacks. In the system demonstration, we show how maps annotated with the findings of the system are filtered by the access control module to produce appropriate views for users with different clearances and terminals under given release and protection policies. Copyright 2013 acm.

关键词： access control

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On the notion of redundancy in access control policies 13

On the notion of redundancy in access control policies

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18th acm symposium on access control models and technologies, sacmat 2013

作者： Guarnieri, Marco Neri, Mario Arrigoni Magri, Eros Mutti, Simone Institute of Information Security ETH Zürich Switzerland Università degli Studi Bergamo Italy Comelit R and D Comelit Group S.p.A Italy

ISBN: (纸本)9781450319508

The evolution of information systems sees an increasing need of flexible and sophisticated approaches for the automated detection of anomalies in security policies. One of these anomalies is redundancy, which may increase the total cost of management of the policies and may reduce the performance of access control mechanisms and of other anomaly detection techniques. We consider three approaches that can remove redundancy from access control policies, progressively reducing the number of authorizations in the policy itself. We show that several problems associated with redundancy are NP-hard. We propose exact solutions to two of these problems, namely the Minimum Policy Problem, which consists in computing the minimum policy that represents the behaviour of the system, and the Minimum Irreducible Policy Problem, consisting in computing the redundancy-free version of a policy with the smallest number of authorizations. Furthermore we propose heuristic solutions to those problems. We also present a comparison between the exact and heuristics solutions based on experiments that use policies derived from bibliographical databases. Copyright 2013 acm.

关键词： Redundancy

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SecureBPMN: Modeling and enforcing access control requirements in business processes 12

SecureBPMN: Modeling and enforcing access control requiremen...

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17th acm symposium on access control models and technologies, sacmat'12

作者： Brucker, Achim D. Hang, Isabelle Lückemeyer, Gero Ruparel, Raj SAP Research Vincenz-Priessnitz-Str. 1 76131 Karlsruhe Germany Hochschule für Technik Stuttgart Schellingstr. 24 70174 Stuttgart Germany

ISBN: (纸本)9781450312950

Modern enterprise systems have to comply to regulations such as Basel III resulting in complex security requirements. These requirements need to be modeled at design-time and enforced at runtime. Moreover, modern enterprise systems are often business-process driven, i.e., the system behavior is described as high-level business processes that are executed by a business process execution engine. Consequently, there is a need for an integrated and tool-supported methodology that allows for specifying and enforcing compliance and security requirements for business process-driven enterprise systems. In this paper, we present a tool chain supporting both the design-time modeling as well as the run-time enforcement of security requirements for business process-driven systems. Copyright 2012 acm.

关键词： access control

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A Card Requirements Language Enabling Privacy-Preserving access control

A Card Requirements Language Enabling Privacy-Preserving Acc...

引用

15th acm symposium on access control models and technologies

作者： Camenisch, Jan Moedersheim, Sebastian Neven, Gregory Preiss, Franz-Stefan Sommer, Dieter IBM Res Zurich Zurich Switzerland

ISBN: (纸本)9781450300490

We address the problem of privacy-preserving access control in distributed systems. Users commonly reveal more personal data than strictly necessary to be granted access to online resources, even though existing technologies, such as anonymous credential systems, offer functionalities that would allow for privacy-friendly authorization. An important reason for this lack of technology adoption is, as we believe, the absence of a suitable authorization language offering adequate expressiveness to address the privacy-friendly functionalities. To overcome this problem, we propose an authorization language that allows for expressing access control requirements in a privacy-preserving way. Our language is independent from concrete technology, thus it allows for specifying requirements regardless of implementation details while it is also applicable for technologies designed without privacy considerations. We see our proposal as an important step towards making access control systems privacy-preserving.

关键词： access control Policy Languages Privacy Anonymous Credentials Digital Credentials

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An access control Model for Mobile Physical Objects

An Access Control Model for Mobile Physical Objects

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15th acm symposium on access control models and technologies

作者： Kerschbaum, Florian SAP Res Karlsruhe Germany

ISBN: (纸本)9781450300490

access to distributed databases containing tuples collected about mobile physical objects requires information about the objects' trajectories. Existing access control models cannot encode this information efficiently. This poses a policy management problem to administrators in real-world supply chains where companies want to protect their goods tracking data. In this paper we propose a new access control model as an extension to attribute-based access control that allows trajectory-based visibility policies. We prove the security properties of our novel authentication protocol for distributed systems that can supply the decision algorithm with the necessary reliable information using only standard passive RFID tags. As a result companies will be able to improve confidentiality protection and governance of their object tracking data and more trustingly engage in data sharing agreements.

关键词： access control Distributed Databases RFID Supply Chain Management

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proceedings of seventh acm symposium on access control models and technologies: sacmat 2002

Proceedings of Seventh ACM Symposium on Access Control Model...

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proceedings of seventh acm symposium on access control models and technologies: sacmat 2002

The proceedings contains 17 papers. Topics discussed include access control policies and specifications, role engineering, access control management and models, mobile and cooperative systems and making access control... 详细信息

关键词： Security of data

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proceedings of ninth acm symposium on access control models and technologies sacmat 2004

Proceedings of ninth ACM symposium on access control models ...

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proceedings on the Ninth acm symposium on access control models and technologies, sacmat 2004

The proceedings contains 18 papers from Ninth acm symposium on access control models and technologies, sacmat 2004. The topics discussed include: a logical specification for usage control;implementing access control to people location information;role based access control in ambient and remote space;towards a credential-based implementation of compound access control policies;succinct specifications of portable document access policies;and a role-based approach to access control for XML databases.

关键词： Security of data

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A role-based approach to access control for XML databases 04

A role-based approach to access control for XML databases

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proceedings on the Ninth acm symposium on access control models and technologies, sacmat 2004

作者： Wang, Jingzhu Osborn, Sylvia L. Department of Computer Science University of Western Ontario London Ont. N6A-5B7 Canada

ISBN: (纸本)9781581138726

In order to provide a general access control methodology for parts of XML documents, we propose combining role-based access control as found in the Role Graph Model, with a methodology originally designed for object-oriented databases. We give a description of the methodology, showing how different access modes, XPath expressions and roles can be combined, and how propagation of permissions is handled. Given this general approach, a system developer can design a complex authorization model for collections of XML documents.

关键词： XML

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Role-based access control in ambient and remote space 04

Role-based access control in ambient and remote space

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proceedings on the Ninth acm symposium on access control models and technologies, sacmat 2004

作者： Wedde, Horst F. Lischka, Mario Informatik III University of Dortmund 44221 Dortmund Germany

ISBN: (纸本)9781581138726

In the era of Ubiquitous Computing and world-wide data transfer mobility, as an innovative aspect of professional activities, imposes new and complex problems of mobile and distributed access to information, services, and on-line negotiations for this purpose. This paper restricts itself to presenting a distributed and location-dependent RBAC approach which is multi-layered. Also an adapted form of Administration Nets [24] is presented which allows the scheduling of distributed on-line processes for automated location-dependent negotiating procedures, and for proving their correctness. Examples are discussed in some detail.

关键词： Data transfer

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