• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권1호
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• pp.323-342
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• 2021

Personal health records (PHRs) is an electronic medical system that enables patients to acquire, manage and share their health data. Nevertheless, data confidentiality and user privacy in PHRs have not been handled completely. As a fine-grained access control over health data, ciphertext-policy attribute-based encryption (CP-ABE) has an ability to guarantee data confidentiality. However, existing CP-ABE solutions for PHRs are facing some new challenges in access control, such as policy privacy disclosure and dynamic policy update. In terms of addressing these problems, we propose a privacy protection and dynamic share system (PPADS) based on CP-ABE for PHRs, which supports full policy hiding and flexible access control. In the system, attribute information of access policy is fully hidden by attribute bloom filter. Moreover, data user produces a transforming key for the PHRs Cloud to change access policy dynamically. Furthermore, relied on security analysis, PPADS is selectively secure under standard model. Finally, the performance comparisons and simulation results demonstrate that PPADS is suitable for PHRs.

• International Journal of Computer Science & Network Security
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• 제23권6호
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• pp.99-106
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• 2023

Now a days, large volumes of data is accumulating in every field due to increase in capacity of storage devices. These large volumes of data can be applied with data mining for finding useful patterns which can be used for business growth, improving services, improving health conditions etc. Data from different sources can be combined before applying data mining. The data thus gathered can be misused for identity theft, fake credit/debit card transactions, etc. To overcome this, data mining techniques which provide privacy are required. There are several privacy preserving data mining techniques available in literature like randomization, perturbation, anonymization etc. This paper proposes an Enhanced Hybrid Privacy Preserving Data Mining(EHPPDM) technique. The proposed technique provides more privacy of data than existing techniques while providing better classification accuracy. The experimental results show that classification accuracies have increased using EHPPDM technique.

• 디지털콘텐츠학회 논문지
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• 제17권6호
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• pp.537-543
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• 2016

본 연구의 목적은 유헬스 시스템의 사용(usage)이라는 행위 의도(behavioral intention)에 미치는 영향 요인들 간의 관계에서 건강개인정보(health privacy information)의 조절적 효과(moderating effect)를 분석하는데 있다. 합리적 행동이론에 근거한 모형 내 연구가설로서 자기효능(self-effiacy) 및 인지된 유용성(perceived usefulness)은 유헬스 시스템의 행위 의도(behavioral intention)에 긍정적인 (positive) 영향을 미칠 것이며, 그 경로(path)에서 사용자의 건강개인정보 요인이 각 경로에서 어떤 영향을 미칠 것으로 제시하였다. 본 연구는 그 제시된 연구모형을 검증하기 위해서 PLS-SEM 방법론을 활용하였다. 분석 결과, 제시된 모형 내에서 건강개인정보의 조절적 효과가 R2 설명력의 증가치에 의해 어느 정도의 영향을 미친다고 볼 수 있지만, 조절변수로의 역할보다는 인지적 유용성(perceived usefulness)에 영향을 미치는 독립변수의 역할에 부합됨을 알 수 있었다.

• 한국정보시스템학회지:정보시스템연구
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• 제25권3호
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• pp.1-30
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• 2016

Purpose The purpose of this study is to grasp the factors influencing domestic SNS users' privacy protection behavior and verify their relationship through self-efficacy and responsiveness. Thus, this study tries to suggest efficient and effective measures for SNS personal information protection. Design/methodology/approach To this end, with main variables of the protection motivation theory based on the assumption that when users are exposed to the threat to their health, they would have protection motivation and change their behavior of protecting their health, a research model was suggested. In addition, in order to empirically verify the research model, a survey was performed targeting general college students having the experience of using SNS. Findings As a result of the analysis, first, perceived effectiveness and self-efficacy had a positive effect on responsiveness. Second, perceived barrier had a positive effect on self-efficacy. Third, self-efficacy and responsiveness had a positive effect on privacy protection behavior. This study is expected to contribute to establishing an effective guideline for measures that could induce SNS users' privacy protection behavior.

• 지식경영연구
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• 제22권2호
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• pp.33-53
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• 2021

모바일 앱 사용이 확대되면서 사용자 프라이버시 침해에 대한 염려는 증가되고 있지만 사용자들은 앱을 사용하기 위해 개인정보를 기꺼이 공개하고 있다. 본 연구는 조절초점성향과 프라이버시계산이론을 바탕으로 사용자의 앱 사용의도에 영향을 미치는 동기요인을 제시한다. 제시한 연구모델을 검증하기 위해 헬스 앱을 사용하는 전국의 성인 151명을 대상으로 설문 데이터를 수집하였으며, PLS-SEM 기법을 이용하여 분석을 진행하였다. 연구결과에 따르면 조절초점 두 성향 중 향상초점성향은 정보프라이버시염려와 프라이버시위험에 부의 영향을 미쳤으며, 예방초점성향은 정보프라이버시 염려에 정의 영향을 주었다. 정보프라이버시염려는 모바일 앱 사용의도에 부의 영향을 미쳤으며 프라이버시이익과 프라이버시지식은 모바일 앱 사용의도에 정의 영향을 미쳤다. 마지막으로 모바일 앱 사용의도는 모바일 앱 지속사용의도에 정의 영향을 미쳤다. 본 연구는 앱 사용자의 조절초점성향이 정보프라이버시염려에 미치는 영향관계의 차이를 규명하였으며 이에 따른 모바일 앱 사용의도의 영향을 확인하였다.

• 의료법학
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• 제7권2호
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• pp.137-178
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• 2006

The purpose of this paper is to analyse the present situation and legal problems of u-health. U-health plays an important role in enlarging the healthcare service and making the healthcare service efficient. The use of Korean excellent IT technology can lead us to a world wide competitive healthcare industry. Although u-health has the weakness in privacy protection, the usefulness and convenience of u-health is great. Therefore we must analyse the legal issues of security technology, RFID, telemedicine and EMR pertaining to u-health and construct the appropriate legislative structure to resolve the legal problems of u-health.

• 한국컴퓨터정보학회논문지
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• 제25권10호
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• pp.59-67
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• 2020

웨어러블 기기의 발전으로 개인의 건강 상태를 실시간으로 확인하고 위험을 예측할 수 있게 되었다. 예를 들어 심장 질환 환자의 심박수, 심전도가 이상 수치를 보이면 위급 상황을 감지하여 자동으로 보호자에게 연락한다. 이처럼 즉각적인 대처를 가능케 하는 건강 데이터는 생명에 관계되는 만큼 유출되었을 시 심각한 피해를 발생시킨다. 본 연구는 지역 차분 프라이버시 기법을 통해 데이터 소유자의 개인 정보를 보호하면서 데이터를 수집하는 방법을 제안한다. 선행 연구에서는 고정된 k개의 특징 점을 탐색하는 알고리즘으로 전체 데이터가 아닌 특징 점 데이터를 데이터 수집가에게 전송하는 기법을 소개하였다. 이어서 본 연구는 최적의 특징 점 개수 k를 찾는 알고리즘을 이용하여 성능을 최대 75% 향상시키는 방법에 대해 설명할 것이다.

• International Journal of Computer Science & Network Security
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• 제22권3호
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• pp.364-374
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• 2022

Health information systems (HIS) are facing security challenges on data privacy and confidentiality. These challenges are based on centralized system architecture creating a target for malicious attacks. Blockchain technology has emerged as a trending technology with the potential to improve data security. Despite the effectiveness of this technology, still HIS are suffering from a lack of data privacy and confidentiality. This paper presents a blockchain-based data storage security architecture integrated with an e-Health care system to improve its security. The study employed a qualitative research method where data were collected using interviews and document analysis. Execute-order-validate Fabric's storage security architecture was implemented through private data collection, which is the combination of the actual private data stored in a private state, and a hash of that private data to guarantee data privacy. The key findings of this research show that data privacy and confidentiality are attained through a private data policy. Network peers are decentralized with blockchain only for hash storage to avoid storage challenges. Cost-effectiveness is achieved through data storage within a database of a Hyperledger Fabric. The overall performance of Fabric is higher than Ethereum. Ethereum's low performance is due to its execute-validate architecture which has high computation power with transaction inconsistencies. E-Health care system administrators should be trained and engaged with blockchain architectural designs for health data storage security. Health policymakers should be aware of blockchain technology and make use of the findings. The scientific contribution of this study is based on; cost-effectiveness of secured data storage, the use of hashes of network data stored in each node, and low energy consumption of Fabric leading to high performance.

• 품질경영학회지
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• 제46권4호
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• pp.877-898
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• 2018

Purpose: This study empirically examines the effect of Communication Privacy Management(CPM) factors and Privacy Calculus factors to the intention to disclose Personal Health Information(PHI) in the context of healthcare ecosystem. Also, it investigates the moderating effects of CPM factors in the relationship between privacy calculus variables and the intention to disclose PHI. Methods: We conducted scenario-based repeated-measures quasiexperiment and used total 364 samples for analysis. Confirmatory factor analysis and repeated-measure ANOVA were employed using SPSS 24.0. Results: All CPM factors, such as type of information, requesting purpose, and requesting stakeholder, directly influence to the intention to disclose PHI, whereas only the medium trust out of the Privacy Calculus factors has direct influence on the intention to disclose PHI. With regard to the moderating effects, the requesting stakeholder is the most influential and the information type is the least influential construct. Conclusion: The findings suggest that healthcare system should be designed to provide more definite and personalized benefits to customers to enhance social and individual benefits by getting more participation from customers. Also, it is desirable that the requesting stakeholder of PHI would be non-profit organizations such as hospital, government or public agencies to secure more willingness of PHI from people. Furthermore, it is implied that extensive information gathering and utilization, instead of excluding sensitive information or critical patients' records, is recommended which is substantial to invigorate the healthcare industry.

• Asian Journal for Public Opinion Research
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• 제8권3호
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• pp.222-245
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• 2020

In the pandemic crisis, many governments implemented harsh interventions that might contradict democratic values and civil liberties. In Taiwan, the debate over whether or not to reveal personal information of infected persons to limit the coronavirus's spread poses the democratic dilemma between public health and civil liberties. This study examines whether and explains how Taiwan's people respond to the choice between individual privacy and collective security. We used survey data gathered in May 2020 to show that, first, the democratic values did not deter the pursuit of collective safety at the cost of civil liberty; rather, people with higher social trust were more likely to give up their civil liberties in exchange for public safety. Second, people who support democratic values and pursue collective security tend to avoid violating privacy by opposing the release of personal information. This study proves that democratic values do not necessarily threaten collective safety and that the pursuit of common good can co-exist with personal privacy.