There has been considerable research in specifying authorization policies for XML documents. Most of these approaches consider only hierarchical structure of underlying data. They define authorization policies by directly identifying XML nodes in the policies. These approaches work well for hierarchical structure but are not suitable for other required characteristics we identify in this paper ...

Role-Based Access Control, for short RBAC, is a security technology that ensures system resources can not be accessed by non-authorized users. It can be used in network security and works well for grid security as well. Based on the research of RBAC model at present the paper proposes a role-based access control model in grid environment. The model still discusses the issues of role authorizati...

Workflow Management Systems (WFMS) are being widely used today by organizations to coordinate the execution of various applications representing their day-to-day tasks. To ensure that these tasks are executed by authorized users or processes (subjects), and to make sure that authorized subjects gain access on the required objects only during the execution of the specific task, granting and revo...

Despite recent widespread interest in the secure au-thentication of principals across computer networks there has been considerably less discussion of distributed m e chanisms to support authorization and accounting. By generalizing the authentication model to support restricted p r oxies, both authorization and accounting can be e asily supported. This paper presents the proxy model for author...

With the emergence of tighter corporate policies and government regulations, access control has become an integral part of business requirements in enterprises. The authorization process in enterprise systems follow the request-response model, where a policy enforcement point intercepts application requests, obtains authorization decisions from a remote policy decision point, and enforces those...

Grid computing is a system that coordinates distributed resources using standards, open, general purpose protocols and interfaces to provide nontrivial quality of services. Usage Control model (UCON) is a new emerging authorization framework that combined features of traditional access control, trust management and digital right management in one abstraction. Adoption of UCON improved the fine-...

It has been a subject of a significant amount of research to automate the execution of workflows (or business processes) on computer resources. However, many workflow scenarios still require human involvement, which introduces additional security and authorization concerns. This paper presents a novel mechanism for modeling the execution of workflows with human involvement under Rolebased Autho...

Grid systems, which are composed of autonomous domains, are open and dynamic. In such systems, there are usually a large number of users, the users are changeable, and different domains have their own policies. The traditional access control models that are identity based are closed and inflexible. The Attribute Based Access Control (ABAC) model, which makes decisions relying on attributes of r...

The Integration of object-oriented programming concepts with databases IS one of the most significant advances In the evolutlon of database systems and several recent pro}ects are developing object-oriented databases Among the many Issues brought along by this combination, one that IS becoming important ISthe protection of information We develop here an authorization model for objectorlented da...

A Bank ATM is including controller, card authorization system and a teller unit .This paper explains howthis parts connects together. In this paper will be used of a new mode place in Petri nets. More systemsusually have a complex constructs. ATM will be simulated use of new mode place at this study. The Mainpart of this model is used of T.S.Staines model [1]. We discuss how a simple model of T...