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检索条件"任意字段=SACMAT 2005: Proceedings of 10th ACM Symposium on Access Control Models and Technologies"

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A Study of Application Sandbox Policies in Linux 22

A Study of Application Sandbox Policies in Linux

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27th acm symposium on access control models and technologies (sacmat)

作者： Dunlap, Trevor Enck, William Reaves, Bradley North Carolina State Univ Raleigh NC 27695 USA

ISBN: (纸本)9781450393577

Desktop operating systems, including macOS, Windows 10, and Linux, are adopting the application-based security model pervasive in mobile platforms. In Linux, this transition is part of the movement towards two distribution-independent application platforms: Flatpak and Snap. this paper provides the first analysis of sandbox policies defined for Flatpak and Snap applications, covering 283 applications contained in both platforms. First, we find that 90.1% of Snaps and 58.3% of Flatpak applications studied are contained by tamperproof sandboxes. Further, we find evidence that package maintainers actively attempt to define least-privilege application policies. However, defining policy is difficult and error-prone. When studying the set of matching applications that appear in both Flatpak and Snap app stores, we frequently found policy mismatches: e.g., the Flatpak version has a broad privilege (e.g., file access) that the Snap version does not, or vice versa. this work provides confidence that Flatpak and Snap improve Linux platform security while highlighting opportunities for improvement.

关键词： access control sandbox policy linux applications

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Multi-party access control-10 Years of Successes and Lessons Learned 20

Multi-party Access Control-10 Years of Successes and Lessons...

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25th acm symposium on access control models and technologies (sacmat)

作者： Squicciarini, Anna Cinzia Penn State Univ Coll Informat Sci & Technol University Pk PA 16802 USA

ISBN: (纸本)9781450375689

As end-users have been asked to take on management tasks for their content and online resources, access control mechanisms have played an increasingly important role in a broad range of applications. these include data management for personalized medicine, content sharing sites, online communities, and technologies for remote collaborative work. To address the need of these emerging user-centered domains, an increasing body of work has recognized the importance of new multi-user (or more generally, stakeholder) access control mechanisms for multiple users. the emphasis on group-centered access control has led to a shift from the traditional approach taken in the access control community for two main reasons. First, the access control community had long investigated models and techniques to facilitate single subjects' access to resources according to well-defined locally-enforceable policies, with little attention given to group-driven access control decisions. Second, the underlying goal had been to maintain confidentiality rather than facilitate controlled sharing. As such, the decisions offered by these early mechanisms are single-user driven and often binary and based on inflexible policies. Consequently, researchers have investigated and proposed a variety of multiparty access control mechanisms [5], and defined rigorous models for content management among multiple users, also developing mechanisms for various applications [1-4, 6-10]. Some tools for practical applications have also been developed. However, we have also assisted to several "failures" where promising approaches have not gained traction, either among the research community or (even less) the applied world. In this talk I will first discuss unique needs and challenges with addressing access control for multi-owned content, and provide a perspective from various applications. Next, I will summarize main successes and failures of existing approaches, identify open research challenges for future resea

关键词： access control Privacy Relationship-Bases access control Multi-Party access control Conflict Resolution

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sacmat'10 - proceedings of the 15th acm symposium on access control models and technologies

SACMAT'10 - Proceedings of the 15th ACM Symposium on Access ...

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15th acm symposium on access control models and technologies, sacmat 2010

ISBN: (纸本)9781450300490

the proceedings contain 19 papers. the topics discussed include: a model of triangulating environments for policy authoring;towards analyzing complex operating system access control configurations;monitoring security policies with metric first-order temporal logic;on the definition of role mining;mining roles with noisy data;StateMiner: an efficient similarity-based approach for optimal mining of role hierarchy;role mining based on weights;access control in practice: pain points;automated management of network access control from design to enforcement;role-based access control (RBAC) in Java via proxy objects using annotations;role updating for assignments;enforcing spatial constraints for mobile RBAC systems;capability-based delegation model in RBAC;and a card requirements language enabling privacy-preserving access control.

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sacmat 2005: proceedings of 10th acm symposium on access control models and technologies

SACMAT 2005: Proceedings of 10th ACM Symposium on Access Con...

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sacmat 2005: proceedings of 10th acm symposium on access control models and technologies

the proceedings contain 19 papers. the topics discussed include: integrity constraints in trust management;declaration and enforcement of fine-grained access restrictions for a service-based geospatial data infrastructure;future direction of access control models, architectures, and technologies;supporting conditional delegation in secure workflow management systems;a fine-grained, controllable, user-to-user delegation method in RBAC;relevancy based access control of versioned XML documents;provable bounds for portable and flexible privacy-preserving access rights;verifiable composition of access control and application features;adaptive trust negotiation and access control;and role mining with ORCA.

关键词： control system analysis

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GEO-RBAC: A spatially aware RBAC 05

GEO-RBAC: A spatially aware RBAC

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10th acm symposium on access control models and technologies

作者： Damiani, Maria Luisa Bertino, Elisa Catania, Barbara Perlasca, Paolo Univ Milan Dipartimento Informat & Comunicaz I-20135 Milan Italy Ecole Polytech Fed Lausanne IC LBD CH-1015 Lausanne Switzerland Univ Genoa Dipartimento Informat & Sci Informat I-16146 Genoa Italy Purdue Univ CERIAS CS Dept W Lafayette IN 47907 USA Purdue Univ ECE Sch W Lafayette IN 47907 USA

ISBN: (纸本)9781595930453

Securing access to data in location- based services and mobile applications requires the definition of spatially aware access- control systems. Even if some approaches have already been proposed either in the context of geographic database systems or context- aware applications, a comprehensive framework, general and flexible enough to deal with spatial aspects in real mobile applications, is still missing. In this paper, we make one step toward this direction and present GEO- RBAC, an extension of the RBAC model enhanced with spatial- and location- based information. In GEOR-BAC, spatial entities are used to model objects, user positions, and geographically bounded roles. Roles are activated based on the position of the user. Besides a physical position, obtained from a given mobile terminal or a cellular phone, users are also assigned a logical and device- independent position, representing the feature ( the road, the town, the region) in which they are located. To enhance flexibility and reusability, we also introduce the concept of role schema, specifying the name of the role, as well as the type of the role spatial boundary and the granularity of the logical position. We then extend GEO- RBAC to support hierarchies, modeling permission, user, and activation inheritance, and separation of duty constraints. the proposed classes of constraints extend the conventional ones to deal with different granularities ( schema/ instance level) and spatial information. We conclude the paper with an analysis of several properties concerning the resulting model.

关键词： GIS access-control model location-based services

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proceedings of acm symposium on access control models and technologies, sacmat: Foreword

Proceedings of ACM Symposium on Access Control Models and Te...

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proceedings of acm symposium on access control models and technologies, sacmat 2005年 iii页

作者： Ferrari, Elena Ahn, Gail-Joon

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Future direction of access control models, architectures, and technologies 05

Future direction of access control models, architectures, an...

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sacmat 2005: proceedings of 10th acm symposium on access control models and technologies

作者： Beznosov, Konstantin University of British Columbia Canada

No abstract available

ISBN: (纸本)9781595930453

No abstract available

关键词： access control ARCHITECTURE Building construction

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A reference monitor for workflow systems with constrained task execution 05

A reference monitor for workflow systems with constrained ta...

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sacmat 2005: proceedings of 10th acm symposium on access control models and technologies

作者： Crampton, Jason Information Security Group Royal Holloway University of London

ISBN: (纸本)9781595930453

We describe a model, independent of any underlying access control paradigm, for specifying authorization constraints such as separation of duty and cardinality constraints in workflow systems. We present a number of results enabling us to simplify the set of authorization constraints. these results form the theoretical foundation for an algorithm that can be used to determine whether a given constrained work-flow can be satisfied: that is. does there exist an assignment of authorized users to workflow tasks that satisfies the authorization constraints? We show that this algorithm can be incorporated into a workflow reference monitor that guarantees that every workflow instance can complete. We derive the computational complexity of our algorithm and compare its performance to comparable work in the literature. Copyright 2005 acm.

关键词： control system analysis

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Adaptive trust negotiation and access control 05

Adaptive trust negotiation and access control

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sacmat 2005: proceedings of 10th acm symposium on access control models and technologies

作者： Ryutov, Tatyana Zhou, Li Neuman, Clifford Leithead, Travis Seamons, Kent E. Information Sciences Institute University of Southern California Marina del Rey CA 90292-6695 Internet Security Research Lab. Brigham Young University Provo UT 84602-6576

ISBN: (纸本)9781595930453

Electronic transactions regularly occur between business partners in separate security domains. Trust negotiation is an approach that provides an open authentication and access-control environment for such transactions, but it is vulnerable to malicious attacks leading to denial of service or leakage of sensitive information. this paper introduces an Adaptive Trust Negotiation and access control (ATNAC) framework to solve these problems. the framework combines two existing systems, TrustBuilder and GAA-AP1, to create a system with more flexibility and responsiveness to attack than either system currently provides. Copyright 2005 acm.

关键词： control system analysis

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A fine-grained, controllable, user-to-user delegation method in RBAC 05

A fine-grained, controllable, user-to-user delegation method...

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sacmat 2005: proceedings of 10th acm symposium on access control models and technologies

作者： Wainer, Jacques Kumar, Akhil Institute of Computing State University of Campinas Campinas Brazil Smeal College of Business Penn State University University Park PA United States

ISBN: (纸本)9781595930453

this paper addresses the issues surrounding user-to-user delegation in RBAC. We show how delegations can be incorporated into the RBAC model in a simple and straightforward manner. A special feature of the model is that it allows fine-grained control over what rights a user wishes to delegate as opposed to delegation at the role level where all the rights of a role must be delegated. In addition, the model provides a rich set of controls regarding further delegations of a right, generic constraints that further control delegations, and an innovative model for revocations. Properties of both delegation and revocation are discussed, and our work is compared with other related research. Copyright 2005 acm.

关键词： control system analysis

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