Usage control is a generalization of access control that also addresses how data is handled after it is released. Controlling the future usage of data includes controlling the future distribution of data. The evolution of policies upon re-distribution must hence be defined. Intuitively, clients should only strengthen policies associated with a data item when they re-distribute it. We provide a ...

Separation of duties is an important, real-world requirement that access control models should support. In 13], Sandhu introduced the transaction control expression (TCE) for specifying dynamic separation of duties. In this paper we consider the implementation of TCEs in the typed access matrix model (TAM) recently proposed by Sandhu 16]. We show that TAM requires extension for satisfactory han...

Separation of duties is an important, real-world requirement that access control models should support. In [13], Sandhu introduced the transaction control expression (TCE) for specifying dynamic separation of duties. In this paper we consider the implementation of TCEs in the typed access matrix model (TAM) recently proposed by Sandhu [16]. We show that TAM requires extension for satisfactory h...

Maturity models are widespread used in several domains ranging from business processes to complete management frameworks like CMMI, ITIL or Cobit. In the paper on hand we develop a detailed maturity model for the management of segregation of duties in ERP systems. Our model includes several aspects starting with simple access rights management of individual systems and leading to comprehensive ...

This essay rebuts Gary Seay's efforts to show that committing euthanasia need not conflict with a physician's professional duties. First, I try to show how his misunderstanding of the correlativity of rights and duties and his discussion of the foundation of moral rights undermine his case. Second, I show aspects of physicians' professional duties that clash with euthanasia, and that attempts t...

INTRODUCTION A process of construction of institutional declaration of mental health patient's duties and rights is shown, highlighting that mentally ill people are considered particularly susceptible to the violation of their rights. Some aspects from historical, quality issues and law in Colombia are presented. Some declarations of rights were available, but they needed to be updated and adap...