A New Role Hierarchy Model for Role Based Access Control

A new role hierarchy model for RBAC (role-based access control) is presented and its features are illustrated through examples. Some new concepts such as private permission, public permission and special permission are introduced, based on the RRA97 model. Some new role-role inheriting forms such as normal inheritance, private inheritance, public inheritance and special-without inheritance are defined. Based on the ideas mentioned, the new role hierarchy model is formulated. It is easier and more comprehensible to describe role-role relationships through the new model than through the traditional ones. The new model is closer to the real world and its mechanism is more powerful. Particularly it is more suitable when used in large-scale role hierarchies.

Role based access control design using Triadic concept analysis

Role based access control is one of the widely used access control models.There are investigations in the literature that use knowledge representation mechanisms such as formal concept analysis(FCA),description logics,and Ontology for representing access control mechanism.However,while using FCA,investigations reported in the literature so far work on the logic that transforms the three dimensional access control matrix into dyadic formal contexts.This transformation is mainly to derive the formal concepts,lattice structure and implications to represent role hierarchy and constraints of RBAC.In this work,we propose a methodology that models RBAC using triadic FCA without transforming the triadic access control matrix into dyadic formal contexts.Our discussion is on two lines of inquiry.We present how triadic FCA can provide a suitable representation of RBAC policy and we demonstrate how this representation follows role hierarchy and constraints of RBAC on sample healthcare network available in the literature.

Consistency maintenance for constraint in role-based access control model

Constraint is an important aspect of role based access control and is sometimes argued to be the principal motivation for role based access control (RBAC). But so far few authors have discussed consistency maintenance for constraint in RBAC model. Based on researches of constraints among roles and types of inconsistency among constraints, this paper introduces corresponding formal rules, rule based reasoning and corresponding methods to detect, avoid and resolve these inconsistencies. Finally, the paper introduces briefly the application of consistency maintenance in ZD PDM, an enterprise oriented product data management (PDM) system.

An Efficient Role and Object Based Access Control Model Implemented in a PDM System

An effective and reliable access control is crucial to a PDM system.This article has discussed the commonly used access control models,analyzed their advantages and disadvantages,and proposed a new Role and Object based access control model that suits the particular needs of a PDM system.The new model has been implemented in a commercial PDM system,which has demonstrated enhanced flexibility and convenience.

Centralized Role-Based Access Control for Federated Multi-Domain Environments

The secure interaction among multiple security domains is a major concern. In this paper, we highlight the issues of secure interoperability among multiple security domains operating under the widely accepted Role Based Access Control （RBAC） model. We propose a model called CRBAC that easily establishes a global policy for roles mapping among multiple security domains. Our model is based on an extension of the RBAC model. Also, multiple security domains were composed to one abstract security domain. Also roles in the multiple domains are translated to permissions of roles in the abstract security domain. These permissions keep theirs hierarchies. The roles in the abstract security domain implement roles mapping among the multiple security domains. Then, authorized users of any security domain can transparently access resources in the multiple domains.

The Research of Role Tree-Based Access Control Model

Towards the crossing and coupling permissions in tasks existed widely in many fields and considering the design of role view must rely on the activities of the tasks process,based on Role Based Accessing Control (RBAC) model,this paper put forward a Role Tree-Based Access Control (RTBAC) model. In addition,the model definition and its constraint formal description is also discussed in this paper. RTBAC model is able to realize the dynamic organizing,self-determination and convenience of the design of role view,and guarantee the least role permission when task separating in the mean time.

A General Attribute and Rule Based Role-Based Access Control Model

Growing numbers of users and many access control policies which involve many different resource attributes in service-oriented environments bring various problems in protecting resource.This paper analyzes the relationships of resource attributes to user attributes in all policies, and propose a general attribute and rule based role-based access control(GAR-RBAC) model to meet the security needs. The model can dynamically assign users to roles via rules to meet the need of growing numbers of users. These rules use different attribute expression and permission as a part of authorization constraints, and are defined by analyzing relations of resource attributes to user attributes in many access policies that are defined by the enterprise. The model is a general access control model, and can support many access control policies, and also can be used to wider application for service. The paper also describes how to use the GAR-RBAC model in Web service environments.

A Cache Considering Role-Based Access Control and Trust in Privilege Management Infrastructure

PMI （privilege management infrastructure） is used to perform access control to resource in an E-commerce or E-government system. With the ever-increasing need for secure transaction, the need for systems that offer a wide variety of QoS （quality-of-service） features is also growing. In order to improve the QoS of PMI system, a cache based on RBAC （Role-based Access control） and trust is proposed. Our system is realized based on Web service. How to design the cache based on RBAC and trust in the access control model is deseribed in detail. The algorithm to query role permission in cache and to add records in cache is dealt with. The policy to update cache is introduced also.

Design and Implementation of File Access and Control System Based on Dynamic Web

A dynamic Web application, which can help the departments of enterprise to collaborate with each other conveniently, is proposed. Several popular design solutions are introduced at first. Then, dynamic Web system is chosen for developing the file access and control system. Finally, the paper gives the detailed process of the design and implementation of the system, which includes some key problems such as solutions of document management and system security. Additionally, the limitations of the system as well as the suggestions of further improvement are also explained.

基于RBAC模型的前后端分离系统设计与实现

权限管理是现代信息管理系统核心功能之一,能够让用户可以安全访问系统数据,其中基于角色的访问控制模型是常用的一种权限管理模型,其优点是能够灵活地处理角色与权限之间的变化问题,为复杂的权限管理问题提供便利性。另一方面前后端分离技术能够很好地解决前端页面开发和后端服务器功能开发解耦的问题,让分工双方更加注重各自面对的业务问题,减少对开发人员技术门槛的要求,从而大大提高了开发效率。因此采用前后端分离技术实现通用的基于角色的访问控制系统具有一定的实用价值。

General Attribute Based RBAC Model for Web Services

Growing numbers of users and many access policies that involve many different resource attributes in service-oriented environments cause various problems in protecting resource. This paper analyzes the relationships of resource attributes to user attributes based on access policies for Web services, and proposes a general attribute based role-based access control（GARBAC） model. The model introduces the notions of single attribute expression, composite attribute expression, and composition permission, defines a set of elements and relations among its elements and makes a set of rules, assigns roles to user by inputing user＇s attributes values. The model is a general access control model, can support more granularity resource information and rich access control policies, also can be used to wider application for services. The paper also describes how to use the GARBAC model in Web services environments.

基于RBAC模型的网络安全访问控制系统

为缩短网络安全访问控制系统的响应时间,设计了一种基于角色的访问控制(Role-BasedAccess Control,RBAC)模型的网络安全访问控制系统。通过网关设备采用树莓派,外网设备采用路由器完成系统硬件设计。通过设计RBAC模型的知识库、基于RBAC模型的身份认证功能、用户信任值评估功能完成系统软件设计。仿真实验结果表明,当并发用户数量为10 000时,本文设计的网络安全访问控制系统的平均响应时间为1.38 s,工作效率较好,具有一定的应用价值。

Least Privileges and Role’s Inheritance of RBAC

The main advantages of role-based access control （RBAC） are able to support the well-known security principles and roles＇inheritance. But for there remains a lack of specific definition and the necessary formalization for RBAC, it is hard to realize RBAC in practical work. Our contribution here is to formalize the main relations of RBAC and take first step to propose concepts of action closure and deta closure of a role, based on which we got the specification and algorithm for the least privileges of a role. We propose that roles＇ inheritance should consist of inheritance of actions and inheritance of data, and then we got the inheritance of privileges among roles, which can also be supported by existing exploit tools.

Design and Implementation of Linux Access Control Model

In this paper,the design and implementation of an access control model for Linux system are discussed in detail. The design is based on the RBAC model and combines with the inherent characteristics of the Linux system,and the support for the process and role transition is added.The core idea of the model is that the file is divided into different categories,and access authority of every category is distributed to several roles.Then,roles are assigned to users of the system,and the role of the user can be transited from one to another by running the executable file.

Visualization Framework for Inter-Domain Access Control Policy Integration

The rapid increase in resource sharing across domains in the cloud comput- ing environment makes the task of managing inter-domain access control policy integration difficult for the security administrators. Al- though a number of policy integration and sec- urity analysis mechanisms have been devel- oped, few focus on enabling the average ad- ministrator by providing an intuitive cognitive sense about the integrated policies, which considerably undermines the usability factor. In this paper we propose a visualization flame- work for inter-domain access control policy integration, which integrates Role Based Ac- cess Control （RBAC） policies on the basis of role-mapping and then visualizes the inte- grated result. The role mapping algorithm in the framework considers the hybrid role hier- archy. It can not only satisfy the security con- straints of non-cyclic inheritance and separa- tion of duty but also make visualization easier. The framework uses role-permission trees and semantic substrates to visualize the integrated policies. Through the interactive policy query visualization, the average administrator can gain an intuitive understanding of the policy integration result.

基于RBAC的IPv6环境网络信息安全访问控制方法

常规的互联网协议第6版(Internet Protocol version 6,IPv6)环境网络信息安全访问控制方法主要使用ReliefF算法获取最优特征集合,易受访问约束限制影响,导致安全访问控制延时过高。针对此问题,利用基于角色的控制访问(Role-Based Access Control,RBAC)方法设计一种全新的IPv6环境网络信息安全访问控制方法。构建了IPv6环境网络信息安全访问控制模型,利用RBAC生成了网络信息安全访问控制关系,实现了网络信息安全访问控制。实验结果表明,所设计的基于RBAC的IPv6环境网络信息安全访问控制方法的访问控制延时相对较低,证明设计的环境网络信息安全访问的控制效果较好,具有可靠性,有一定的应用价值,为降低IPv6环境网络风险做出了一定的贡献。

基于策略的动态角色分配模型及应用

访问控制是应用系统中的重要问题之一。传统的基于角色的访问控制(RBAC)方案需要预先定义和同步用户-角色赋值关系,这会带来管理成本和同步开销,并且限制了应用系统的灵活性和动态性。文章提出一种基于策略的动态角色分配模型(Policy-based Dynamic Role Assignment Model——PDRA),它无需同步用户就可以自定义角色,并通过策略匹配的方式实现动态分配。模型完全兼容RBAC,可以成为RBAC良好的扩展机制。文章给出了模型的定义和算法,评估了模型的性能,并在华东师范大学的数据治理平台中进行了应用,验证了该方案的可行性和有效性。

RBAC模型研究、改进与实现

针对传统RBAC模型的角色管理过于复杂,权限粒度不够细化等不足,提出了一种改进模型,并详细描述了该改进模型的特点,引入了限制元素和特有权限等新概念。通过将功能模块及其相关操作映射为权限数据,使得权限代码和业务逻辑代码完全解耦。最后结合实例,详细阐述了该改进模型应用于权限管理系统的实现过程,以及该模型的优缺点。

基于RBAC改进模型的角色权限及层次关系分析

针对著名的 RBAC96模型的不足之处 ,结合私有权限、部门权限和权限属性变化等问题 ,对角色权限及角色层次关系进行了分析 ,提出了一个改进的角色层次化关系模型 .该模型引入特征权限等概念 ,通过定义一般继承、私有化继承、公有化继承和无特征继承等新的角色继承方式建立角色层次化关系模型 .新模型比 RBAC96模型更加简化和易于理解 ,且具有更强的可伸缩性 ,特别适合于在复杂的角色层次关系中应用 ,例如网络操作系统、大型数据库、分布式应用等 .