Dependencies and Separation of Duty Constraints in GTRBAC

A Generalized Temporal Role Based Access Control (GTRBAC) model that captures an exhaustive set of temporal constraint needs for access control has recently been proposed. GTRBAC’s language constructs allow one to specify various temporal constraints on role, user-role assignments and role-permission assignments. In this paper, we identify various time-constrained cardinality, control flow dependency and separation of duty constraints (SoDs). Such constraints allow specification of dynamically changing access control requirements that are typical in today’s large systems. In addition to allowing specification of time, the constraints introduced here also allow expressing access control policies at a finer granularity. The inclusion of control flow dependency constraints allows defining much stricter dependency requirements that are typical in workflow types of applications

A secure, constraint-aware role-based access control interoperation framework

With the growing needs for and the benefits of sharing resources and information among different organizations, an interoperation framework that automatically integrates policies to facilitate such cross-domain sharing in a secure way is becoming increasingly important. To avoid security breaches, such policies must enforce the policy constraints of the individual domains. Such constraints may include temporal constraints that limit the times when the users can access the resources, and separation of duty (SoD) constraints. Existing interoperation solutions do not address such cross-domain temporal access control and SoDs requirements. In this paper, we propose a role-based framework to facilitate secure interoperation among multiple domains by ensuring the enforcement of temporal and SoD constraints of individual domains. To support interoperation, we do not modify the internal policies, as most of the current approaches do. We present experimental results to demonstrate our proposed framework is effective and easily realizable. © 2011 IEEE

Architectural Alignment of Access Control Requirements Extracted from Business Processes

Business processes and information systems evolve constantly and affect each other in non-trivial ways. Aligning security requirements between both is a challenging task. This work presents an automated approach to extract access control requirements from business processes with the purpose of transforming them into a) access permissions for role-based access control and b) architectural data flow constraints to identify violations of access control in enterprise application architectures

Security Provisioning in Cloud Environments using Dynamic Expiration Enabled Role based Access Control Model

In cloud environment the role based access control (RBAC) system model has come up with certain promising facilities for security communities. This system has established itself as highly robust, powerful and generalized framework for providing access control for security management. There are numerous practical applications and circumstances where the users might be prohibited to consider respective roles only at certain defined time periods. Additionally, these roles can be invoked only on after pre-defined time intervals which depend on the permission of certain action or event. In order to incarcerate this kind of dynamic aspects of a role, numerous models like temporal RBAC (TRBAC) was proposed, then while this approach could not deliver anything else except the constraints of role enabling. Here in this paper, we have proposed robust and an optimum scheme called Dynamic expiration enabled role based access control (DEERBAC) model which is efficient for expressing a broad range of temporal constraints. Specifically, in this approach we permit the expressions periodically as well as at certain defined time constraints on roles, user-role assignments as well as assignment of role-permission. According to DEERBAC model, in certain time duration the roles can be further restricted as a consequence of numerous activation constraints and highest possible active duration constraints. The dominant contributions of DEERBAC model can the extension and optimization in the existing TRBAC framework and its event and triggering expressions. The predominant uniqueness of this model is that this system inherits the expression of role hierarchies and Separation of Duty (SoD) constraints that specifies the fine-grained temporal semantics. The results obtained illustrates that the DEERBAC system provides optimum solution for efficient user-creation, role assignment and security management framework in cloud environment with higher user count and the simultaneous rolepermission,

Object-specific Role-based Access Control

The proper management of privacy and security constraints in information systems in general and access control in particular constitute a tremendous, but still prevalent challenge. Role-based access control (RBAC) and its variations can be considered as the widely adopted approach to realize authorization in information systems. However, RBAC lacks a proper object-specific support, which disallows establishing the fine-grained access control required in many domains. By comparison, attribute-based access control (ABAC) enables a fine-grained access control based on policies and rules evaluating attributes. As a drawback, ABAC lacks the abstraction of roles. Moreover, it is challenging to engineer and to audit the granted privileges encoded in rule-based policies. This paper presents the generic approach of object-specific role-based access control (ORAC). On one hand, ORAC enables information system engineers, administrators and users to utilize the well-known principle of roles. On the other, ORAC allows realizing the access to objects in a fine-grained way where required. The approach was systematically established according to well-elicited key requirements for fine-grained access control in information systems. For the purpose of evaluation, the approach was applied to real-world scenarios and implemented in a proof-of-concept prototype demonstrating its feasibility and applicability