Surveillance for influenza deaths has been used to gauge the severity of influenza seasons. Traditional surveillance, which relies on medical records review and laboratory testing, might not be sustainable during a pandemic. We examined whether electronic death certificates might provide a surveillance alternative. We compared information retrieved from electronic death certificates that listed...

Various credential based approaches have been proposed for realizing access control on shared data sources. These approaches use various types of credentials like identity certificates, attribute certificates, authorization certificates etc. Different credentials are found to be suitable in different conditions. The aim of this paper is to develop an access control methodology that not only ena...

In this paper, we describe a general method for controlling the behavior of mobile agent-system entities through the allocation of privileges. Privileges refer to policy rules that govern the access and use of computational resources and services. The scheme is based on the capability of most mobile agent systems to extend the platform processing environment and the use of two forms of privileg...

In this paper, we describe a general method for controlling the behavior of mobile agent-system entities through the allocation of privileges. Privileges refer to policy rules that govern the access and use of computational resources and services. The scheme is based on the capability of most mobile agent systems to extend the platform processing environment and the use of two forms of privileg...

We address the issue of updating privileges in a dynamic environment by introducing authority cerrtificates in a Privilege Management Infrastructure. These certificates can be used to create access-level permissions but also to delegate authority to other agents, thereby providing a mechanism for creating management structures and for changing these structures over time. We present a semantic f...

In this paper, we proposed a formal representation of certificate validation in Pretty Good Privacy (PGP) and X.509 systems. This representation uses new logical assertions to support public-key based certification systems and different trust levels. Although the meanings of some of those assertions are different in PGP and X.509 cases, the certificate validation can be expressed using the same...

Security infrastructures are increasingly used in the health care and welfare sector, particularly for providing security, like confidentiality, authenticity, integrity, nonrepudiation, and auditing. Especially within the health care sector, there is a need for different kinds of certificates, namely public-key certificates and attribute certificates. This necessity is caused by the huge range ...

Digital certificates are key component of trust used by many operating systems. Modern operating systems implement a form of digital signature verification for various applications, including kernel driver installation, software execution, etc. Digital signatures rely on digital certificates that authenticate the signature, which then verify the validity of a given signature for a signed binary...

This paper describes a method for controlling the behavior of mobile agent-system entities through the allocation of privileges. Privileges refer to policy rules that govern the access and use of computational resources and services by mobile agents. Our method is based on extending the platform processing environment, using the capabilities present in most mobile agent systems, and applying tw...

In the National Vocational Education Reform Program, pilot project of "academic certificate + several vocational skills certificates" (1+X for short) system is proposed, in which certificates reflect comprehensive quality required individual career development. Therefore, based on demand construction industry highly skilled talents with skill level certificates, current situation planning senio...