Model-Driven Security (Mds) is a specialized Model-Driven Engineering (Mde) approach for supporting the development of secure systems. Model-Driven Security aims at improving the productivity of the development process and quality of the resulting secure systems, with models as the main artifact. Among the variety of models that have been studied in a Model-Driven Security perspective, one can ...

Object based, imperative languages with delegation (eg SELF) support exploratory programming: composition of objects, sharing of attributes and modification of objects’ behaviour at run-time are easily expressible. Delegation allows objects to delegate execution of methods to other objects and to adapt delegated behaviour by overriding of method definitions. These features allow for creation of...

Article history: Received 27 October 2011 Received in revised form 6 August 2012 Accepted 16 August 2012 Available online xxxx A great deal of research on geographically distributed organizing focuses on communication among members; however, in the face of increasingly large, complex and interdependent infrastructure, scholars must also examine instances of technology-supported coordination tha...

OBJECTIVES To examine the impact of the degree of electronic health record (EHR) use and delegation of EHR tasks on clinician productivity in ambulatory settings. STUDY DESIGN We examined EHR use in primary care practices that implemented a web-based EHR from athenahealth (n = 42) over 3 years (695 practice-month observations). Practices were predominantly small and spread throughout the coun...

In this paper we address the main questions associated with delegations and the role they play in security architectures for distributed systems; why they are required and how they can be implemented. In distributed and dynamic systems like the Semantic Web or pervasive computing environments, describing comprehensive policies in terms of every possible resource and user is not always possible ...

A ubiquitous feature of modern statutory law is delegation. Legislation typically delegates policy implementation to a bureaucracy. This delegation presents a dilemma. The specialized knowledge of an expert agency may be necessary to unravel the technical uncertainties surrounding the impact of alternative policy actions; however, the policy preferences of bureaucrats are often different from t...

Building support for delegation services into an identity federation system enhances its flexibility and scalability. Users may need to delegate all (or a subset) of their access rights or privileges to other parties in the system. However, the Liberty Alliance, an industry consortium that aims to build open standard-based specifications for identity federation systems, does not include delegat...

The delegation of administrative decision-making powers is explored in the following pages as a legal technique to enhance co-operation between politics and administration, both within the policy-making and in the domains of implementation of policy and law. Delegation, as a legal instrument, also has organisational and managerial consequences insofar as it suggests certain organisational patte...

In predicate encryption systems, given a capability, one can evaluate one or more predicates on the encrypted data, while all other information about the plaintext remains hidden. We consider the first such systems to permit delegation of capabilities. In a system that supports delegation, a user Alice who has a capability can delegate to Bob a more restrictive capability, which allows him to l...

There is currently a great deal of interest in the development of intelligent agents. While there is little agreement on exactly what constitutes an intelligent agent, many definitions embody a user interface model that differs from the traditional one where users perform tasks with the help of computer-based “tools." In contrast, the "delegation" model associated with agents is based on entrus...