This paper proposes a belief logic based approach that allows principals to negotiate and on-the-fly generate security protocols. When principals wish to interact then, rather than offering each other a fixed menu of ‘known’ protocols, they negotiate and generate a new protocol that is tailored specifically to their current security environment and requirements. This approach provides a basis f...

A sequential mixed method approach was used to answer the research questions that guided this study. First, a survey was conducted among principals. Using a stratified random sampling 250 primary school principals from all over Cyprus (total population was 336) participated in this study. Data were collected through questionnaires, which were mailed to the principals. One hundred and thirty one...

When do competing principals independently choose to share the information obtained from their privately informed agents? Information sharing a¤ects contracting relationships within opponent organizations and induces players’strategies to be correlated via the distortions channel. We show that principals’incentives to share information depend on the nature of upstream externalities and the corr...

In Decentralized Trust Management (DTM) authorization decisions are made by multiple principals who can also delegate decisions to each other. Therefore, a policy change of one principal will often affect who gets authorized by another principal. In such a system of influenceable authorization a number of principals may want to coordinate their policies to achieve long time guarantees on a set ...

Dr. Robert W. Frederick, p r in cipal of the Milne school, Dr. J . Allan Hicks, professor of guidance, Dr. C. C. Smith, assistant professor of education, Mr. Paul G. Bulger, secretary of the student employment bureau, and Mr. Warren I. Dens more, supervisor of English, r epre sented State at the fifty-fifth a n nual holiday conference of the Associated Academic Principals of the Sta te of New Y...

Disentangling the roles of intentional effort and luck is critical when evaluating decisions made by others under uncertainty. Previous research shows that this can be a very difficult task. In a principalagent experiment where an agent’s effort is always perfectly observable, we find an undue influence of luck on punishment decisions made by principals. Our experiment identifies attribution bi...

This paper describes design criteria for creating highly embedded, interactive spaces that we call Intelligent Environments. The motivation for building these systems is to bring computation into the real, physical world to support what is traditionally considered non-computational activity. We describe an existing prototype space, known as the Intelligent Room, which was created to experiment ...

SAFE is an example of declarative trust management. Principals use a declarative language to make statements about one another and about objects in the system. These statements are secure assertions: they are authenticated and the source (speaker) of every statement is tracked. Principals reason from these statements according to policy rules, which are also written in the declarative language....

It is common that users or hosts in a large network are partitioned and organized as a hierarchical tree where children of the same parent form a group. Secure broadcasting intends to provide a secure communication channel from a sending principal to a group of legal receiving principals. Only legal receiving principals can decrypt the message, and illegal receiving principals cannot acquire an...

We extend role-based multiparty sessions with reputations and policies associated with principals. The reputation associated with a principal in a service is built by collecting her relevant behaviour as a participant in sessions of the service. The service checks the reputation of principals before allowing them to take part in a session, also according to the role they want to play. Furthermo...