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共 463 条记录，以下是241-250 订阅

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SecureGov: Secure data sharing for government services 13

SecureGov: Secure data sharing for government services

引用

14th Annual International Digital Government Research Conference: From E-Government to Smart Government, dg.o 2013

作者： Choi, John Chun, Soon Ae Kim, Dong Hwa Keromytis, Angelos Division of Computer Software Sangmyung University Seoul Korea Republic of Columbia University City Univ. of New York Staten Island NY United States MarkAny Ssanglim Bldg 10F 151-11 Ssanglim-dong Seoul Korea Republic of Columbia University 1214 Amsterdam Avenue New York NY 10027 United States

ISBN: (纸本)9781450320573

Open Government initiative allows government data available digitally to share and integrate to produce value added information products and citizen services. this "paperless" government facilitates the transparency of government and fosters collaboration across government agencies and among citizens. the citizen services often require sharing citizen data and documents among many different collaborating government agencies, which may contain sensitive information of citizens. In this environment, the security and privacy issues become a paramount priority to build a trust-worthy and sustainable smart government. Even though the existing PKI systems can provide secure exchange of information between two organizations, preventing illegal modification, edits, or transfers of sensitive data to a third parties for unintended purposes is essential at the end user side. In this paper, we present a security and trusted framework for secure Government Data Sharing (SecureGov), implemented in the Public Information Sharing Center (PISC) under the Ministry of Public Administration and Security in Korea. the layered security framework uses combined technologies, including usage control scheme called Enterprise Digital Right Management (E-DRM) to prevent illegal use and leakage, a forgery prevention technology using a 2-D barcode to prevent illegal modification of the data, and PKI scheme to ensure the authenticity of the data. Copyright 2013 acm.

关键词： access control

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Software tool for assessing secondary system opportunities in spectrum whitespaces

Software tool for assessing secondary system opportunities i...

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IEEE International symposium on World of Wireless Mobile and Multimedia Networks (WoWMoM)

作者： Andreas Achtzehn Ljiljana Simić Marina Petrova Petri Mähönen Valentin Rakovic Pero Latkoski Liljana Gavrilovska Institute for Networked Systems RWTH Aachen University Aachen Germany Faculty of Electrical Engineering and Information Technologies Ss. Cyril and Methodius University in Skopje Skopje Macedonia

the prospect of increasing wireless capacity via secondary access to spatio-temporally underutilized chunks of spectrum, so-called whitespaces, has been proposed as a central aspect of emerging radio systems in response to the imminent spectrum scarcity problem. In this demonstration we present a novel software tool that helps researchers, industry, and regulators in assessing the feasibility and value of secondary spectrum access beyond simple whitespace availability calculation. Whereas existing software applications merely provide visualization of estimated secondary spectrum over a geographic area, our tool uniquely enables a holistic evaluation of the realistic potential of whitespace technologies, by modelling the performance of entire secondary systems in the envisioned eco-system of dynamic spectrum access policy and technology. Our tool provides a unified and flexible software framework and assessment methodology to conduct such studies, and is composed of an extensive primary spectrum usage database, a graphical interface for user interaction, and an interface to an extensible MATLAB backend for numerical calculations. We showcase the deployment scenarios of cellular and Wi-Fi-like secondary networks in TVWS (TV whitespaces). We also compare the impact of employing FCC-type of regulatory rules (with a fixed power/no-talk distance configuration) against European WG-SE43 regulatory proposals (with probabilistic access and power control). the case studies we will demonstrate are based on real network configuration data of European and US TV networks.

关键词： Availability Biological system modeling Software tools Interference Transmitters Databases Aggregates

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Enhanced Multi-Domain access control for Secure Mobile Collaboration through Linked Data Cloud In Manufacturing

Enhanced Multi-Domain Access Control for Secure Mobile Colla...

引用

IEEE International symposium on a World of Wireless, Mobile and Multimedia Networks

作者： Patricia Ortiz Oscar Lázaro Mikel Uriarte Manuel Carnerero R&D ICT Unit Innovalia Association S.A. Bilbao Spain R&D Nextel S.A. Bilbao Spain

ISBN: (纸本)9781467358279

Collaborative networked organizations represent an important paradigm to help manufacturing companies to cope with the challenges of market turbulence. However, although manufacturing companies are increasingly aiming to implement mobile collaboration models, there are still some barriers that prevent manufacturers from effectively sharing big data leveraged in particular by the use of Internet of things technologies. these barriers are basically related to the lack of security controls and lightweight data management enablers that would guarantee the protection of sensitive information published on the Linked Data cloud and leverage customers from the burden of linked data sharing. the aim of this paper is to present and discuss the industrial application of the necessary extensions to traditional role-based multi-domain access control approaches to enable secure and mobile collaboration among manufacturing enterprises in logistic, manufacturing and e-Commerce processes in the context of the Web of Data.

关键词： access control Linked Data Cross domain authentication Authorization SPARQL Query rewriting Mobile Collaboration Internet of things

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Towards a policy enforcement infrastructure for distributed usage control 12

Towards a policy enforcement infrastructure for distributed ...

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

作者： Kelbert, Florian Pretschner, Alexander Karlsruhe Institute of Technology Am Fasanengarten 5 Karlsruhe Germany

ISBN: (纸本)9781450312950

Distributed usage control is concerned with how data may or may not be used after initial access to it has been granted and is therefore particularly important in distributed system environments. We present an application- and application-protocol-independent infrastructure that allows for the enforcement of usage control policies in a distributed environment. We instantiate the infrastructure for transferring files using FTP and for a scenario where smart meters are connected to a Facebook application. Copyright 2012 acm.

关键词： distributed usage control policy enforcement sticky policies security and privacy

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Encryption-enforced access control for an RFID Discovery Service 12

Encryption-enforced access control for an RFID Discovery Ser...

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

作者： Kerschbaum, Florian Chaves, Leonardo Weiss Ferreira Department of Privacy and Data Security Technical University Dresden Germany SAP AG SAP Research Center Karlsruhe Germany

ISBN: (纸本)9781450312950

In this demonstration we present a novel encryption scheme for enforcing access control in a Discovery Service. A Discovery Service is a piece of software that allows one to "discover" item-level data which is stored in data repositories of different companies. Such data can be gathered with the help of Radio Frequency Identification or 2D bar codes. Our software allows the data owner to enforce access control on an item-level by managing the corresponding keys. Data remains confidential even against the provider of the Discovery Service. We present three ways of querying data and evaluate them with databases containing up to 50 million tuples. Copyright 2012 acm.

关键词： Radio frequency identification (RFID)

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A model-based approach to automated testing of access control policies 12

A model-based approach to automated testing of access contro...

引用

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

作者： Xu, Dianxiang thomas, Lijo Kent, Michael Mouelhi, Tejeddine Le Traon, Yves National Center for the Protection of the Financial Infrastructure Dakota State University Madison SD 57042 United States Interdisciplinary Centre for Security Reliability and Trust University of Luxembourg Campus Kirchberg L-1359 Luxembourg

ISBN: (纸本)9781450312950

access control policies in software systems can be implemented incorrectly for various reasons. this paper presents a model-based approach for automated testing of access control implementation. To feed the model-based testing process, test models are constructed by integrating declarative access control rules and contracts (preconditions and post-conditions) of the associated activities. the access control tests are generated from the test models to exercise the interactions of access control activities. Test executability is obtained through a mapping of the modeling elements to implementation constructs. the approach has been implemented in an industry-adopted test automation framework that supports the generation of test code in a variety of languages, such as Java, C, C++, C#, and HTML/Selenium IDE. the full model-based testing process has been applied to two systems implemented in Java. the effectiveness is evaluated in terms of access-control fault detection rate using mutation analysis of access control implementation. the experiments show that the model-based tests killed 99.7% of the mutants and the remaining mutants caused no policy violations. Copyright 2012 acm.

关键词： access control

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Automated Verification of Role-based access control Security models Recovered from Dynamic Web Applications

Automated Verification of Role-based Access Control Security...

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14th IEEE International symposium on Web Systems Evolution (WSE)

作者： Alalfi, Manar H. Cordy, James R. Dean, thomas R. Queens Univ Sch Comp Kingston ON Canada

ISBN: (纸本)9781467330558

this paper presents an original Model-Driven-Engineering (MDE) approach to support the verification and testing of security properties in dynamic web applications. Based on a previously recovered UML-based fine-grained security model, the approach begins by transforming the model into a Prolog-based formal model. the Prolog model is then checked to verify whether the application conforms to specified access control security properties. We demonstrate the use of our method on the popular open source bulletin board system PhpBB 2.0, in the context of three test scenarios: testing for unauthorized access, web application security maintenance, and web application re-engineering.

关键词： web applications Verification access control Security

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SCUTA: A server-side access control system for web applications 12

SCUTA: A server-side access control system for web applicati...

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

作者： Tan, Xi Du, Wenliang Luo, Tongbo Soundararaj, Karthick D. Dept. of Electrical Engineering and Computer Science Syracuse University Syracuse NY United States

ISBN: (纸本)9781450312950

the Web is playing a very important role in our lives, and is becoming an essential element of the computing infrastructure. Unfortunately, its importance makes it the preferred target of attacks. Web-based vulnerabilities now outnumber traditional computer security concerns. A recent study shows that over 80 percent of web sites have had at least one serious vulnerability. We believe that the Web's problems, to a large degree, are caused by the inadequacy of its underlying access control systems. To reduce the number of vulnerabilities, it is essential to provide web applications with better access control models that can adequately address the protection needs of the current Web. As a part of the efforts to develop a better access control system for the Web, we focus on the server-side access control in this paper. We introduce a new concept called subsession, based on which, we have developed a ring-based access control system (called Scuta) for web servers. Scuta provides a fine-grained and backward-compatible access control mechanism for web applications. We have implemented Scuta in PHP, and have conducted comprehensive case studies to evaluate its benefits. Copyright 2012 acm.

关键词： Websites

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Practical risk aggregation in RBAC models 12

Practical risk aggregation in RBAC models

引用

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

作者： Chari, Suresh Lobo, Jorge Molloy, Ian IBM Research TJ Watson Hawthorne NY United States

ISBN: (纸本)9781450312950

this paper describes our system, built as part of a commercially available product, for inferring the risk in an RBAC policy model, i.e., the assignment of permissions to roles and roles to users. Our system implements a general model of risk based on any arbitrary set of properties of permissions and users. Our experience shows that fuzzy inferencing systems are best suited to capture how humans assign risk to such assignments. To implement fuzzy inferencing practically we need the axiom of monotonicity, i.e., risk can not decrease when more permissions are assigned to a role or when the role is assigned to fewer users. We describe the visualization component which administrators can use to infer aggregate risk in role assignments as well as drill down into which assignments are actually risky. Administrators can then use this knowledge to refactor roles and assignments. Copyright 2012 acm.

关键词： access control

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PlexC: A policy language for exposure control 12

PlexC: A policy language for exposure control

引用

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

作者： Le Gall, Yann Lee, Adam J. Kapadia, Apu Department of Computer Science University of Pittsburgh Pittsburgh PA United States School of Informatics and Computing Indiana University Bloomington Bloomington IN United States

ISBN: (纸本)9781450312950

With the widespread use of online social networks and mobile devices, it is not uncommon for people to continuously broadcast contextual information such as their current location or activity. these technologies present both new opportunities for social engagement and new risks to privacy, and traditional static 'write once' disclosure policies are not well suited for controlling aggregate exposure risks in the current technological landscape. therefore, we present PlexC, a new policy language designed for exposure control. We take advantage of several recent user studies to identify a set of language requirements and features, providing the expressive power to accommodate information sharing in dynamic environments. In our evaluation we show that PlexC can concisely express common policy idioms drawn from survey responses, in addition to more complex information sharing scenarios. Copyright 2012 acm.

关键词： Social networking (online)

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