• KSII Transactions on Internet and Information Systems (TIIS)
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• v.17 no.9
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• pp.2550-2572
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• 2023

Epidemiological survey is an important means for the prevention and control of infectious diseases. Due to the particularity of the epidemic survey, 1) epidemiological survey in epidemic prevention and control has a wide range of people involved, a large number of data collected, strong requirements for information disclosure and high timeliness of data processing; 2) the epidemiological survey data need to be disclosed at different institutions and the use of data has different permission requirements. As a result, it easily causes personal privacy disclosure. Therefore, traditional access control technologies are unsuitable for the privacy protection of epidemiological survey data. In view of these situations, we propose a black box-assisted fine-grained hierarchical access control scheme for epidemiological survey data. Firstly, a black box-assisted multi-attribute authority management mechanism without a trusted center is established to avoid authority deception. Meanwhile, the establishment of a master key-free system not only reduces the storage load but also prevents the risk of master key disclosure. Secondly, a sensitivity classification method is proposed according to the confidentiality degree of the institution to which the data belong and the importance of the data properties to set fine-grained access permission. Thirdly, a hierarchical authorization algorithm combined with data sensitivity and hierarchical attribute-based encryption (ABE) technology is proposed to achieve hierarchical access control of epidemiological survey data. Efficiency analysis and experiments show that the scheme meets the security requirements of privacy protection and key management in epidemiological survey.

• Journal of Advanced Navigation Technology
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• v.11 no.1
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• pp.118-126
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• 2007

An ad hoc network is a system of wireless mobile nodes that dynamically self-organize in arbitrary and temporary network topologies allowing people and devices to internetwork without any preexisting communication infrastructure. Although ad hoc network is attractive solution, there are still some major flaws that prevent commercial growth. Security is one of these main barriers; ad hoc networks are known to be particularly vulnerable to security attack. It is difficult to establish a centralized key distribution center and a trusted certification authority to provide cryptographic keys and digital certificates to nodes. To prevent attacks in ad hoc routing protocols, many algorithms have been used. In this paper, we have depicted a secure framework for multipath routing in wireless multihop network, which is comprehensive solution for secure data forwarding in wireless multihop networks. With the simulation results, the proposed scheme is compared with existing source routing scheme.

• Journal of Korean Public Health Nursing
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• v.10 no.2
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• pp.74-89
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• 1996

It hasbeen individual and social problems that mattoids, alcohols and old people alienated from their families have wandered about the streets for rapid urbanzation, industrialization and nuclear families. In our country, measures for proper guidance for the tramps under the supports of government in 1982 have been carried out. But it has been difficult that we protected without Welfare Acts for them. According to those the study has aimed to provide for the fundamental data to advance public utilities as needs of an administrative organ with focus on contents of nursing records charts, furthermore general traits of subjects perceived details related to diseases. Medical record service has been a 'D' municipal hospital. All the subjects were a total of 4,855 persons, 2.436 in 1992, 2.419 in 1994. 1. Social Traits They mainly have attended a hospital, especially Thursday and Friday from a week and winter from the seasons. They equally have attended a hospital in the beginning, middle and end of the month. They equally have attended a hospital in the months. Government and public offices such as police stations and district offices have trusted them to a hospital. After they left a hospital. their residence has been their home confirmed in the ratio of $59.2\%$. 2. Controling Characteristics of a Medical Institution The proportion of males to females was 7 to 1. In the ages, the adults at the first of adulthood from 25 years to 44 years were $52.6\%$ mostly entered a hospital. In the observations the percentage of patients should be entered total was $8.8\%$. In general. the proportion of changes by fee was about $4\%$. Then the number of patients were on an average from 30. 76 to 32, 55 persons in 1992. It was from 25. 63 to 26. 87 in 1994. But the numbers were 5 to 6. It showed that the number was decreased. 3. Medical Traits The number of days by measured and the number of days which have been entered to a hospital have not made differences. The kinds of diseases were 1.11 in 1992. but were 1. 16 in 1994. In terms of 17 kinds of international diseases divided. the diseases recorded probably have been accidents. poisoning and violence( XVII). digestive trouble(IX). endoctrin disoders. metabolism and dystrophy(III) in orders, then they have been measured $51.0\%,\; 12.7\%,\; 6.8\%$. All patients who have been entered to a hospital severly have been drinking. As the seriousness of drinking and the kinds of diseases have indicated positively correlated. It have indicated that the more serious drinking have been. the more the number of diseases have been. As we have known according to abover results. the Acts for Homeless People related to special medical problems been have revised. furthemore they need to support the basic medical adds in order to maintaim their lives.