Grid access control policy languages today are generally one of two extremes: either extremely simplistic, or overly complex and challenging for even security experts to use. In this paper, we explicitly identify requirements for an access control policy language for Grid data and then consider six specific data access use-cases that have been problematic in today’s Grids: attribute-based acces...

Purpose is a key concept in privacy policies. Based on the purpose framework developed in our earlier work [11] we present an access control model for a work ow-based information system in which a work ows reference monitor ( WfRM ) enforces purpose-based policies. We use a generic access control policy language and show how it can be connected to the purpose modal logic language ( PML ) to lin...

Web services are becoming the way for enterprises to interoperate. Many security standards for them have been developed; one of these is XACML (eXtensible Access Control Markup Language). XACML has been defined by OASIS and it includes a policy, an access decision language, and a specialized web services policy language. We present here three architectural patterns for XACML. The XACML Authoriz...

manuscripts of manuchehri’s divan are relatively new. only one manuscript dates back to 1051 a.h. scribes have systematically “modernized” the older records. to have access to the poet’s language, one must either refer to the old manuscripts which are still unknown or else resort to literary miscellanies containing the poet’s poems. the author has presented here a number of different and rather...

The present study investigated the impact of bilingual education on language achievement of Iranian Pre-intermediate EFL learners. It actually used bilingual education through content- based methodology or subject matter such as math, science and reading. To this purpose, the researchers used 40 Pre-intermediate EFL participants who were studying English conversation at a private language insti...