• 정보보호학회논문지
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• 제13권6호
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• pp.97-106
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• 2003

공개키 기반구조에서 중요한 요소는 상대방에 대한 인증이다. 서로 간에 인증을 위해서 각각 인증서를 얻는다. 그리고 인증서 취소 목록을 통해서 인증서의 유효성 유무를 체크하게 된다. 그러나 CRL을 이용하는 것은 오프라인 상태에서 사용하는 방법이다. 따라서 최신의 정보를 참조하는 것은 불가능하고 시간이 지남에 따라서 CRL의 크기가 커지게 되어 다운받은 후에 사용하는 CRL 기법은 여러 가지로 불편하게 된다. 따라서 오프라인에서 사용하는 CRL 보다는 온라인에서 사용되는 OCSP를 선호하게 된다. 이에 본 논문에서는 인증서 저장소와 분산된 OCSP 서버에게 동일한 갱신 정보를 소유하게 해서 인증서 검증 요청이 있을 경우 인근의 OCSP 서버를 이용해서 빠른 검증 결과를 제공하는 기법을 제시하고자 한다.

• 한국보건간호학회지
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• 제36권2호
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• pp.240-252
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• 2022

Purpose: The purpose of this study was to draw practical implications applicable to the field by analyzing a double-mediator model of social participation and depression in relation to the utilization of Information Communication Technology (ICT) and cognitive function. Methods: The data from the Fifth Living Profiles of Older People Survey in Korea was used, and the sample included 3,925 people, 75 years of age or older. Descriptive statistics, correlation analysis, and the PROCESS macro test were used for verification of the double mediator model. Results: The results were as follows: First, ICT utilization was rated at an average of 1.4 out of 10, social participation at an average of 1.1 out of 7, depression at an average of 3.72 out of 15, and cognitive function at an average of 22.42 out of 30. Second, ICT utilization has a significant effect on cognitive function. Third, the mediating effects of social participation between ICT utilization and cognitive function were significant. Fourth, the mediating effects of depression between ICT utilization and cognitive function were not significant. Fifth, the serial double mediator effects leading to ICT utilization, social participation, depression, and cognitive function were significant. Conclusion: The study discussed the implications of maintaining and protecting cognitive function in the vulnerable elderly through the utilization of ICT.

• International Journal of Internet, Broadcasting and Communication
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• 제13권2호
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• pp.60-66
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• 2021

Blockchain is a technology that enables trust-based consensus and verification based on a decentralized network. Distributed ID (DID) is based on a decentralized structure, and users have the right to manage their own ID. Recently, interest in self-sovereign identity authentication is increasing. In this paper, as a method for transparent and safe sovereignty management of data, among data pseudonymization techniques for blockchain use, various methods for data encryption processing are examined. The public key technique (homomorphic encryption) has high flexibility and security because different algorithms are applied to the entire sentence for encryption and decryption. As a result, the computational efficiency decreases. The hash function method (MD5) can maintain flexibility and is higher than the security-related two-way encryption method, but there is a threat of collision. Zero-knowledge proof is based on public key encryption based on a mutual proof method, and complex formulas are applied to processes such as personal identification, key distribution, and digital signature. It requires consensus and verification process, so the operation efficiency is lowered to the level of O (log_eN) ~ O(N²). In this paper, data encryption processing for blockchain DID, based on zero-knowledge proof, was proposed and a one-way encryption method considering data use range and frequency of use was proposed. Based on the content presented in the thesis, it is possible to process corrected zero-knowledge proof and to process data efficiently.

• 한국도서관정보학회지
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• 제44권2호
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• pp.345-376
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• 2013

웰빙에 대한 관심이 증가하면서 소비자건강정보에 대한 관심이 증가하고 있으며, 건강관련 사이트의 수가 지속적으로 증가하고 있다. 이로 인해 공공도서관에서의 소비자건강정보(CHI, consumer health information) 관련 참고서비스에 대한 요구가 증가하고 있는 것으로 보고되고 있다. 그러나 공공도서관사서들은 CHI 관련 참고서비스를 수행함에 있어 다른 참고서비스와 달리 부담감을 가지고 있는 것으로 나타났다. 따라서 CHI 참고서비스를 효과적으로 제공할 수 있는 방안 모색이 필요하다고 볼 수 있다. 이에 본 연구에서는 국내외의 연구 및 국외에서 개발된 가이드라인을 총체적으로 분석하여 공공도서관사서를 위한 CHI 참고서비스 가이드라인을 개발하였다. 개발된 가이드라인은 전문가 자문 및 설문조사를 통해 검증과정을 거쳤다.

• Journal of Preventive Medicine and Public Health
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• 제45권1호
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• pp.29-36
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• 2012

Objectives: The purpose of this study was to identify any influence of socioeconomic status on smoking and smoking cessation in a situation where genetic factors are controlled. Methods: The sample for this study was 2502 members of the twins and families cohort who participated in the Korean Healthy Twins Study from 2005 to 2009. Groups of brothers or sisters, including twins and fraternal twins, were compared in terms of smoking and smoking cessation behaviors according to differences in socioeconomic status and gender. Results: In a situation with complete control of genetic factors, results showed that the daily smoking amount, cumulative smoking amount, and dependence on nicotine decreased with higher-status occupations, and the rate of smoking and amount of cumulative smoking decreased with higher levels of education. Regarding smoking cessation behavior, a higher level of education was associated with a lower smoking cessation rate, and no significant gender differences were found. Conclusions: Environmental factors had a stronger influence on smoking behavior than did genetic factors. Genetic factors had greater influence on smoking cessation than did environmental factors; however, this requires verification in further studies.

• 경영과정보연구
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• 제17권
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• pp.161-189
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• 2005

As the importance of intellectual assets has been brought into relief, this study aims at positively verifying where the intellectual workers' overall level of their knowledge conversion preference and their job character has reached, and how much the knowledge conversion preference, the job character and the fitness of both factors affects the job effectiveness respectively. For this purpose 3 types of research hypotheses were set up and the result of the verification of the hypotheses is summarized as follows: First, the verification of the relation between the knowledge conversion preference and the job effectiveness revealed that the workers who have the higher synthetic ability in knowledge conversion preference show the higher job satisfaction and job product. Secondly, the verification of the relation between the MPS representing the job character by measured index and the job satisfaction revealed that the absolute value of relative coefficient between the 4 factors excluding the public welfare factor and the MPS is 4, interpreted as medium correlation. Thirdly, the analysis on the degree of relation between the job product measured by the quality of job result and the input effort and the MPS showed that the absolute value of person relative coefficient is 5, interpreted not only as medium correlation but also very meaningful. Accordingly, the main purpose of this study was to give a guideline which can be utilized as an indicator for educating, training and placing the workers. As results, the main effect that the variable of knowledge conversion preference and job character chosen as the independent variable influences on the dependent variable of job satisfaction and job product is very meaningful except the public welfare factor.

• Journal of Preventive Medicine and Public Health
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• 제38권4호
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• pp.420-424
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• 2005

Objectives : A few culture-confirmed cases of S. sonnei have been notified from Korean hospitals. The source of epidemic can't be firmly determined in such cases because of the rarity of this illness in the local communities and the timing of the outbreaks. The objective of this study is to estimate the source of epidemic by investigating the patients' lifestyles. Methods : Alibi verification was used to access the presumed source of the epidemic. PCR (Polymerase Chain Reaction) was used to rapidly detect the genes of Shigella in water specimens. Results : The common lifestyle trait among the Shigella infected patients was connected with Mt. Martyr in J city, Korea. The first patient's son had gone on a pilgrimage to Mt. Martyr with 41 friends and he had only eaten rice cakes on April 5th; the second patients had visited Mt. Martyr with their mother for a picnic on April 12th; the third patient had visited Mt. Martyr with 22 friends for a pilgrimage and the patient had only drunk holy water on April 13th. Therefore, the holy water of Mt. Martyr was reckoned to be the source of the epidemic. PCR detected the genes of Shigella two days before the S. sonnei was confirmed. Conclusion : The patients' lifestyles for 7 days before the onset of symptoms should be determined in terms of time, place and contacted people to find the source of infection when cases with food poisoning are seen in the hospital setting.

• 기록학연구
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• 제77호
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• pp.5-36
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• 2023

강력한 대통령중심제를 채택하고 있는 대한민국에서 대통령이 인사권을 가진 직위에 대하여 업무 능력, 평판, 비위 여부 등을 종합적으로 인사검증하는 것은 국가운영의 기본일 뿐만 아니라 민주주의 체계의 유지를 위해서도 매우 중요하다. 그 과정에서 생산된 인사검증 관련 기록물 또한 국가의 중요 인물들에 대한 광범위한 자료를 담고 있어, 그 자체로 매우 중요한 국가적 차원의 정보이며, 후세에 현재의 국가운영을 연구하는 데 유용한 사료로 활용될 가능성이 매우 높다. 그렇기 때문에 2007년 「대통령기록물 관리에 관한 법률」 제정 이후, 인사검증 업무를 담당한 대통령비서실 민정수석비서관실은 광범위한 인사검증기록물을 대통령지정기록물로 지정하여 대통령기록관으로 이관하였을 것으로 추정된다. 그런데 제20대 정부가 출범하면서 2022년 6월부터 인사검증 담당기관이 대통령비서실 민정수석비서관실에서 법무부 '인사정보관리단'으로 변경됨에 따라 그간 유지된 인사검증 프로세스와 관련된 기록물의 보존에 커다란 변화가 생겼다. 이에 이 연구에서는 우선 인사검증기록물이 무엇이며 그간 어떻게 보존되고 관리되어 왔는지를 살펴 보았다. 그리고 이번 인사검증 담당기관의 변화로 인해 기록관리 차원에서 어떠한 쟁점이 생겨났는지, 그 쟁점들을 어떤 방식으로 해결해야 하는지에 대하여 실무적· 제도적 차원에서 개선 방안을 제안하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제12권4호
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• pp.180-187
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• 2020

Security threats are increasing with interest due to the mass spread of smart devices, and vulnerabilities in developed applications are being exposed while mobile malicious codes are spreading. The government and companies provide various applications for the public, and for reliability and security of applications, security checks are required during application development. In this paper, among the security threats that can occur in the mobile service environment, we set up the vulnerability analysis items to respond to security threats when developing Android-based applications. Based on the set analysis items, vulnerability analysis was performed by examining three applications of public institutions and private companies currently operating as mobile applications. As a result of application security checks used by three public institutions and companies, authority management and open module stability management were well managed. However, it was confirmed that many security vulnerabilities were found in input value verification, outside transmit data management, and data management. It is believed that it will contribute to improving the safety of mobile applications through the case of vulnerability analysis for Android application security.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.274-280
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• 2005

Future-oriented train design should be able to provide highly refined traffic culture and public transportation service by achieving 'higher value addition, sensitization, and humanization' and then securing safety, convenience, and amenity. Therefore, design of FRT, as a means of environment-friendly public transportation, should have new concepts achieving harmony between design and technology. Consequently, when designing interior of trains for public transportation, it should aim for user-centered strategies. This approach is essentially applied to vehicle design and inducement to new concepts by design aesthetics and their verification become requirements for train Interior design, which should be equipped with sensitivity and functional images. Accordingly, a study on the correlation between constituents in order to implement design is essential to design planning and realization of strategies.