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共 458 条记录，以下是411-420 订阅

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Role-based access control for collaborative enterprise in Peer-to-Peer computing environments 03

Role-based access control for collaborative enterprise in Pe...

引用

proceedings of eighth acm symposium on access control models and technologies

作者： Park, Joon S. Hwang, Junseok School of Information Studies Syracuse University Syracuse NY 13244-4100 United States

ISBN: (纸本)9781581136814

In Peer-to-Peer (P2P) computing environments, each participant (peer) acts as both client and content provider. This satisfies the requirement that resources should be increasingly made available by being published to other users from a user's machine. Compared with services performed by the client-server model, P2P-based services have several advantages. However, wide-scale application of P2P computing is constrained by limitations associated with the especially sophisticated control mechanisms needed between peers. To overcome these limitations, we introduce a controlled P2P computing architecture by extending the concept of Web services to the peer-to-peer level through a generic middleware. Specifically, in this paper we tailor our approach to support RBAC. Although our approach supports both brokered and purist P2P models, all of the policy decisions can be made on the peer side, because policy information is transferred from the policy servers to the corresponding peers through metadata that peers can understand. Each peer makes the access control decision based on the enterprise, the community, and the peer policies without asking other components. This approach supports RBAC services for collaborative enterprise in P2P computing environments, not only within one community but also within inter-communities. Furthermore, it also supports peers' autonomous decisions without causing policy conflicts. The broad dissemination of our approach would enable P2P technology to be applicable to more reliable and efficient services, providing controlled communications between peers.

关键词： Security of data

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The PERMIS X.509 role based privilege management infrastructure 02

The PERMIS X.509 role based privilege management infrastruct...

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TERENA Networking Conference 2002

作者： Chadwick, DW Otenko, A Univ Salford IS Inst Manchester M5 4WT Lancs England

ISBN: (纸本)9781581134964

This paper describes the EC PERMIS project, which has developed a role based access control infrastructure that uses X.509 attribute certificates (ACs) to store the users' roles. All access control decisions are driven by an authorisation policy, which is itself stored in an X.509 AC, thus guaranteeing its integrity. All the ACs can be stored in one or more LDAP directories, thus making them widely available. Authorisation policies are written in XML according to a DTD that has been published at ***. The access control Decision Function (ADF) is written in Java and the Java API is simple to use, comprising of just three methods and a constructor. There is also a Privilege Allocator, which is a tool that constructs and signs ACs and stores them in an LDAP directory for subsequent use by the ADF (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： trust management X.509 attribute certificates role based access controls XML privilege management infrastructure

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Role mining - revealing business roles for security administration using data mining technology 03

Role mining - revealing business roles for security administ...

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proceedings of the eighth acm symposium on access control models and technologies

作者： Martin Kuhlmann Dalia Shohat Gerhard Schimpf SYSTOR Security Solutions GmbH Hermann-Heinrich-Gossen-Strasse 3 Cologne SMF TEAM IT-Security Consulting Am Waldweg 23 Pforzheim

In this paper we describe the work devising a new technique for role-finding to implement Role-Based Security Administration. Our results stem from industrial projects, where large-scale customers wanted to migrate to... 详细信息

ISBN: (纸本)9781581136814

关键词： single point of administration and control data mining enterprise systems management security administration security data models provisioning role-based access control role engineering identity management migration security management

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Specifying and enforcing constraints in role-based access control 03

Specifying and enforcing constraints in role-based access co...

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proceedings of the eighth acm symposium on access control models and technologies

作者： Jason Crampton University of London Egham United Kingdom

ISBN: (纸本)9781581136814

Constraints in access control in general and separation of duty constraints in particular are an important area of research. There are two important issues relating to constraints: their specification and their enforcement. We believe that existing separation of duty specification schemes are rather complicated and that the few enforcement models that exist are unlikely to scale *** examine the assumptions behind existing approaches to separation of duty and present a combined specification and implementation model for a class of constraints that includes separation of duty constraints. The specification model is set-based and has a simpler syntax than existing approaches. We discuss the enforcement of constraints and the relationship between static, dynamic and historical separation of duty constraints. Finally, we propose a model for a scalable role-based reference monitor, based on dynamic access control structures, that can be used to enforce constraints in an efficient manner.

关键词： enforcement context authorization constraint separation of duty constraint role-based access control

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Induced role hierarchies with attribute-based RBAC 03

Induced role hierarchies with attribute-based RBAC

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proceedings of the eighth acm symposium on access control models and technologies

作者： Mohammad A. Al-Kahtani Ravi Sandhu George Mason University

ISBN: (纸本)9781581136814

The Role-Based access control (RBAC) model is traditionally used to manually assign users to appropriate roles. When the service-providing enterprise has a massive customer base, assigning users to roles ought to be automated. RB-RBAC (Rule-Based RBAC) provides the mechanism to dynamically assign users to roles based on a finite set of authorization rules defined by the enterprise's security policy. These rules may have seniority relation among them, which induces a roles hierarchy. The main contribution of this paper is to explore the possible discrepancies between the Induced Roles Hierarchy and any existing roles hierarchy. The functional impact of existing discrepancies and ways of reconciling them are discussed.

关键词： authorization rules attributes access control RBAC roles hierarchies roles

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A stratification-based approach for handling conflicts in access control 03

A stratification-based approach for handling conflicts in ac...

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proceedings of the eighth acm symposium on access control models and technologies

作者： Salem Benferhat Rania El Baida Frédéric Cuppens CRIL-Université d'Artois Lens Cedex France IRIT-Université Paul Sabatier Toulouse Cedex 4 France

ISBN: (纸本)9781581136814

In the health care sector, access to medical information is more and more electronically achieved. Therefore, it is very important to define security policies which restrict access to pieces of information in order to guarantee security properties like confidentiality or integrity properties. These security policies are not always free of conflicts, in particular in the presence of exceptional *** paper proposes tools for access control, based on the notion of roles, in the possibilistic logic framework. We first show how to formalize basic concepts of security policies. Then we present two approaches for dealing with conflicts based on a stratification of security policy's rules. Finally, an example of health care is presented.

关键词： security policy access control conflicts prioritized knowledge bases possibilistic logic

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An administration concept for the enterprise role-based access control model 03

An administration concept for the enterprise role-based acce...

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proceedings of the eighth acm symposium on access control models and technologies

作者： Axel Kern Andreas Schaad Jonathan Moffett Beta Systems Software AG Köln Germany University of York York UK

ISBN: (纸本)9781581136814

Using an underlying role-based model for the administration of roles has proved itself to be a successful approach. This paper sets out to describe the enterprise role-based access control model (ERBAC) in the context of SAM Jupiter, a commercial enterprise security management *** provide an overview of the role-based conceptual model underlying SAM Jupiter. Having established this basis, we describe how the model is used to facilitate a role-based administration approach. In particular, we discuss our notion of 'scopes', which describe the objects over which an administrator has authority. The second part provides a case study based on our real-world experiences in the implementation of role-based administrative infrastructures. Finally, a critical evaluation and comparison with current approaches to administrative role-based access control is provided.

关键词： security provisioning SAM Jupiter automated identity management enterprise roles administrative role-based access control (ARBAC) enterprise role-based access control (ERBAC) role-based access control (RBAC) security administration scopes

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On modeling system-centric information for role engineering 03

On modeling system-centric information for role engineering

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proceedings of the eighth acm symposium on access control models and technologies

作者： Dongwan Shin Gail-Joon Ahn Sangrae Cho Seunghun Jin University of North Carolina at Charlotte Charlotte NC Electronics and Telecommunications Research Institute Taejon South Korea

ISBN: (纸本)9781581136814

In this paper we present an approach to modeling system-centric information in order to facilitate role engineering (RE). In particular, we first discuss the general characteristics of the information required in RE. Afterwards, we discuss two informational flow types among authorities involved in RE process, forward information flow (FIF) and backward information flow (BIF), together with the introduction of an information model which is greatly suitable for use in the backward information flow. System-centic information is incorporated in the information model and UML extension mechanisms are exploited for modeling the information. Not only can the information model provide those different authorities with a method for both analysis of resources and communication of knowledge in the RE process, but it can also help lay a foundation for successful implementations of RBAC.

关键词： role-based access control information model role engineering attributive permissions information flow

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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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A lightweight approach to specification and analysis of role-based access control extensions 02

A lightweight approach to specification and analysis of role...

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proceedings of Seventh acm symposium on access control models and technologies: SacmAT 2002

作者： Schaad, Andreas Moffett, Jonathan D. Department of Computer Science University of York York United Kingdom

ISBN: (纸本)9781581134964

Role-based access control is a powerful and policy-neutral concept for enforcing access control. Many extensions have been proposed, the most significant of which are the decentralised administration of role-based systems and the enforcement of constraints. However, the simultaneous integration of these extensions can cause conflicts in a later system implementation. We demonstrate how we use the Alloy language for the specification of a conflict-free role-based system. This specification provides us at the same time with a suitable basis for further analysis by the Alloy constraint analyser.

关键词： High level languages

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