We propose a simple server-based electronic signature system in which a small number of common private keys are used. The motivation of such a system is to escape the scalability and complexity problems that arise if a large-scale Public Key Infrastructure (PKI) is used. We argue that the assumption of personal private keys is the main reason for those problems and high cost of electronic signa...

As space activities and applications have developed, awareness of the importance dissemination access to science data has also increased. Although there is not yet a detailed legal framework for such access, recent developments as “Space2030” Agenda or Artemis Accords seem consolidate path towards its open benefit all mankind. Nevertheless, wide range questions remain, including very definition...

We define and experimentally test a public provision mechanism that 7 meets three basic ethical requirements and allows community members to influ8 ence, via monetary bids, which of several projects is implemented. For each project, 9 participants are assigned personal values, which can be positive or negative. We 10 provide either public or only private information about personal values. This ...

in many countries around the world, including iran, obesity is reaching epidemic proportions. doctors have recently taken, or expressed support for, an extreme ‘personal responsibility for health’ policy against obesity: refusing services to obese patients. this policy may initially seem to improve patients’ incentives to fight obesity. but turning access to medical services into a benefit depe...

Middle class mothers (n = 169) of middle adolescents (M = 15.69 years old) in the U.S. rated how much they want to know and responded qualitatively about what they "always" and "never" want to know about adolescents' risky prudential (e.g., drinking alcohol, using illegal drugs), personal (e.g., teens' private conversations), and multifaceted (involving overlapping prudential and personal conce...

Identification of the Quantitative Dimensions of Supplementary Private Tutoring among High School Students   Y. Shiraavand* A. Ma’dandaar Aaraani, Ph.D.** I. Nikpey, Ph.D.***   To identify the quantitative dimensions of supplementary private tutoring, a cluster sample of 800 high school students was given a questionnaire on the subject. The collected data reveal that moti...

Mobile ad hoc networking has been a hot research topic for a decade or so, and many paradigms have been making use of it. One of these paradigms is the Personal Networks (PN). It is an emerging concept where the user’s personal devices form a virtual network which is secure and private, and reacts to changing environment and context intelligently. A fundamental property of the PN is that person...