The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
eXtensible Access Control Markup Language (XACML) allows for flexible management of authorisations and is particularly useful in settings where permissions change dynamically. However, it has been shown that policy evaluation in XACML may have scalability problems when policies become large and sophisticated in content. Among several proposals for designing efficient policy decision points for XACML...
One of the primary challenges to apply the XACML access control policy language in applications is the performance problem of policy evaluation engines, particularly when they experience a great number of policies. Some existing works attempted to solve this problem, but only for some particular use-cases: either supporting simple policies with equality comparisons or predefined attribute values....
XACML policy evaluation efficiency is an important factor influencing the overall system performance, especially when the number of policies grows. Some existing approaches on high performance XACML policy evaluation can support simple policies with equality comparisons and handle requests with well defined conditions. Such mechanisms do not provide the semantic correctness of combining algorithms...
Cloud computing is developing as a new wave of ICT technologies, offering a common approach to on-demand provisioning of computation, storage and network resources which are generally referred to as infrastructure services. Most of currently available commercial Cloud services are built and organized reflecting simple relations between a single provider and multiple customers with simple security...
This paper presents ongoing research and current results on the development of flexible access control infrastructures for complex resource provisioning in grid-based collaborative applications and on-demand network services provisioning. The paper identifies basic resource provisioning models and specifies major requirements to authorisation (AuthZ) service infrastructure to support these models...
This paper presents ongoing research and current results on the development of flexible access control infrastructures for complex resource provisioning in grid-based collaborative applications and on-demand network services provisioning. We investigate the use of workflow concepts for the required orchestration of multiple grid resources and/or services across multiple administrative and security...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.