OBJECTIVES Eradication and control of childhood diseases through immunization can only work if parents allow their children to be vaccinated. To learn about social network factors associated with polio vaccine hesitancy, we investigated social and spatial clustering of households by their vaccine acceptance status in Malegaon, India, an area known for vaccine refusal and repeated detection of p...

We describe a web based assessment system whose non-repudiation security feature is based on digital signatures. The first objective of this proposal is to enhance the students’ understanding of the X.509/PKIX framework and digital signatures based on it. The second purpose is to develop a security enhanced web based assessment system, focusing on non-repudiation requirements. At the same time,...

Some people say that children with developmental disabilities are not good at adapting to environmental changes. Indeed, disasters dramatically change our surroundings. During disasters, what we think of as “unchangeable” actually changes, and events that should never have happened do in fact happen. Children with developmental disabilities often have to face major changes, and sometimes, catas...

A fair non-repudiation protocol should guarantee, (1) when a sender sends a message to a receiver, neither the sender nor the receiver can deny having participated in this communication; (2) no principals can obtain evidence while the other principals cannot do so. This paper extends the model in our previous work [12], and gives a sound and complete on-the-fly model checking method for fair no...

We propose a software framework for non-repudiation service in e-commerce (electronic commerce) on the Internet. The proposed software framework is an explicit security framework for notary service. In the framework we propose a systematic design methodology that provides a security class concept. Our framework can be differentiated from others. First, unlike other frameworks, it is interested ...

The subject of this study is the non-repudiation security service for network communication using TCP/IP stack. Generated evidence, as well decision-making process registering a given event, are context-aware. Non-repudiation equipped with context-awareness by widely utilized tools. aim paper to present timing results selected tools execution and complete evidence generation time. In some appli...