Delegation is a mechanism that allows a user A to act on another user B’s behalf by making B’s access rights available to A. It is well recognized as an important mechanism to provide resiliency and flexibility in access control systems, and has gained popularity in the research community. However, most existing literature focuses on modeling and managing delegations. Little work has been done ...

In this paper a theory of delegation is presented. There are at least three reasons for developing such a theory. First, one of the most relevant notions of "agent" is based on the notion of "task" and of "on behalf of". In order to found this notion a theory of delegation among agents is needed. Second, the notion of autonomy should be based on different kinds and levels of delegation. Third, ...

Abstract. Pairing-based cryptography (PBC) has enabled the construction of many cryptographic protocols. However, there are scenarios when PBC is too heavyweight to use, such as when the computing devices are resource-constrained. Pairing delegation introduced in [19] provides a solution by offloading the computation to more powerful entities. In this paper, we introduce the concept of, and con...

We show that the semantic formal model for Open Digital Right Language (ODRL)-based rights delegation policies can be enforced and expressed as a combination of ontologies and rules, e.g., Semantic Web Rule Language (SWRL). Based on ODRL’s expressions and data dictionary, a rights delegation ontology is proposed in this study. Furthermore, we express the rights delegation policy as a set of ont...

We show that the semantic formal model for Open Digital Right Language (ODRL)-based rights delegation policies can be enforced and expressed as a combination of ontologies and rules, e.g., Semantic Web Rule Language (SWRL). Based on ODRL’s expressions and data dictionary, a rights delegation ontology is proposed in this study. Furthermore, we express the rights delegation policy as a set of ont...

The increasing burden of chronic disease and an ageing population in the developed world has led to a shift towards primary care to manage chronic and complex disease. This has prompted a growing interest in the nursing role within general practice. Various models of substitution, delegation and supplementation have been proposed in the literature.1 The impact of these models on patient outcome...

In a typical corporate hierarchy, the manager is delegated the authority to make strategic decisions, and to contract with other employees. We study when such delegation can be optimal. In centralization, the owner retains the authority, which fails to motivate the manager to acquire valuable information, leading to suboptimal decisions and inefficient incentive provision to the worker. Benefic...

The idea of a proxy signature scheme was first presented by Mambo et al. [1] in 1996. Their proxy signature scheme allows an original signer to delegate his signing right to a proxy signer to sign the message on behalf of an original signer. Later, the verifier, which knows the public keys of original signer and a proxy signer can check a validity of a proxy signature issued by a proxy signer. ...

By Volkmar Pipek, Mary Beth Rosson, Gunnar Stevens and Volker Wulf For inclusion in L-in-C Report in the December issue of Journal of Community Informatics (JoCI) November 1, 2005 Introduction Information and Communication Technology (ICT) has become an important factor in our personal lives as well as in our social organizations—at work, at home, in our hospitals, in the political institutions...