This paper proposes a new block cipher called KT-64. We make a cipher using components that are believed secure. The structure of KT-64 is very simple, strong and efficient. We use the controlled substitution-permutation networks (CSPNs) based on controlled elements (CEs) for designing fast block cipher suitable to cheap hardware implementation. Security estimations of KT64 cipher show that pro...

When are comparative statements credible? We show that simple complementarity conditions ensure that an expert with private information about multiple issues can credibly rank the issues for a decision maker. By restricting the expert’s ability to exaggerate, multidimensional cheap talk of this form permits communicationwhen it would not be credible in a single dimension. The communication gain...

Strong, machine-checked security proofs of operating systems have been in the too hard basket long enough. They will still be too hard for large mainstream operating systems, but even for systems designed from the ground up for security they have been counted as infeasible. There are high-level formal models, nice security properties, ways of architecting and engineering secure systems, but no ...

PURPOSE This study aimed to identify the relationships among physical symptoms, activities of daily living, and health-related quality of life (HRQoL) in community-dwelling older adults. METHODS A stratified random sampling method was conducted to recruit participants from May 10 to August 17, 2007. Physical symptoms were measured using the Physical Health Questionnaire (PHQ), activities of d...

OBJECTIVE AND RATIONALE The purpose of this study is to evaluate the degree of fibroid shrinkage which well correlates with symptom regression, and thus to assess the effectiveness of the procedure. METHOD 31 patients were included in the trial after selection. All the patients were thoroughly evaluated before embolization, the following day and at a month after but also at 3 months for 10 of...

Objective: The purpose of this study was to present a model of factors affecting barriers to organizational vitality in government organizations (Case study: government organizations in Mazandaran province). Method: The method of this research was combined (qualitative-quantitative). In order to conduct this research, in addition to the documentary study, the content analysis technique with MA...

U rban poverty has long been a concern of urban and development debates, and has been an important focus in social science research. Informal settlement in Mashhad city is highlighted because of its wide spreading and severity. This study aimed to determine the causes of urban poverty in informal settlement regions. The data were collected from household level questionnaire in 2016 a...