• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.4
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• pp.200-206
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• 2014

Accountable Internet Protocol (AIP) is one of the future Internet architectures to provide accountability concept by using the self-certifying address that is derived by the public key of the host. In AIP, when a host sends a packet, a domain that is located between the source and the destination hosts discards the packet in order to verify the source IP address. Therefore, performance degradation can occur due to packet discard especially when there is asymmetric route. In this paper, we propose the improved AIP mechanism to verify the source IP address without discarding the packet by including the timestamp, public key value and the signature for protecting from forfeiting the source address. Security safety of the proposed mechanism is evaluated and the proposed mechanism can provide the more robust security as well as reducing the latency due to discarding packets.

• Health Policy and Management
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• v.24 no.4
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• pp.396-412
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• 2014

Background: As a reform plan of health care system, Accountable Care Organization (ACO) has became an object of attention in the United States after Patient Protection and Affordable Care Act was enacted. ACO is a group of various health care providers and provide coordinated care to its assigned beneficiaries. If ACOs improve the quality level and reduce the cost of care, they can get financial incentives. Under the discussion for a quite long time and demonstration projects, ACO has been established. We aimed to analysis and discuss the history, policy mechanism, contents, status and outcomes of ACO. Also, we intended to suggest political implication Korean health care system with regard to ACO. Methods: We searched the articles related ACO in PubMed and selected several available papers about ACO. Total 56 studies were reviewed and categorized three parts; demonstration projects for formation of ACO, policy mechanism and agenda, empirical results of ACO performance. Results: As a result, establishment of ACO was successful partly in the US. It seems to be due to various project and pilot test for verification in the long time. The empirical effect of ACO was also identified in a few study but it needs more evidences to judge its positive effect. Conclusion: In Korea, there are arguments for the application of ACO. However it is difficult to implement a ACO by different political conditions between Korean and US. Nevertheless ACO proposed us the necessity of paradigm shift in our health policy and could be significant to national policy orientation in the future.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.6
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• pp.1281-1293
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• 2017

In 2001, Boneh and Franklin proposed Identity-Based Encryption(IBE) that does not require a certificate like Public Key Infrastructure(PKI) by using user's Identity as a public key. However, IBE has a key escrow problem because the Private Key Generator(PKG), who is a trusted authority, generates a secret key of every user. Also, it does not support efficient revocation when the user's secret key is exposed or the system needs to revoke the user. Therefore, in order to use IBE as PKI that currently used, it is necessary to solve the key escrow problem and the revocation problem. In this paper, to solve those two problems, we suggest Accountable Authority Revocable IBE(A-RIBE) based on Accountable Authority IBE that mitigates the key escrow problem and Revocable IBE that solves the revocation problem. Also, we define the security model suitable foe A-RIBE, and analyze the principle of designing A-RIBE according to based A-IBE and RIBE and their advantage and disadvantage.

• Health Policy and Management
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• v.24 no.4
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• pp.304-311
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• 2014

This manuscript treats a new paradigm for the Korean health care system. We give an account of innovative health care delivery and payment models widely discussed in the contemporary US accountable care organization and coordinated care organization. In doing so, we explore a new health care model amenable to foreseeable changes to the health care system. We propose creating an integrated health care system in which the network of health care providers delivers coordinated and comprehensive care for enrolled patients residing within the geographic boundaries served by the provider network; providers may participate voluntarily in one or more networks and assume shared responsibility for patient care and cost; provider networks compete with each other based on cost and quality; and consumers are allowed to choose a network. We expect that the new paradigm will create a financially-sustainable system that assures quality of care and improves patient experience, minimizing the existing system-wide inefficiency through cross-network competition and within-network care coordination.

• Journal of the Korean earth science society
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• v.32 no.5
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• pp.504-513
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• 2011

In this study, we investigated how elementary science teaching has changed with the introduction of the National Assessment of Educational Achievement (NAEA). Teachers are held accountable for student performance as measured by the mandatory nation-wide standards tests to satisfy the needs of accountability and quality assurance systems. In relation to the teaching of science in the elementary school, professionalism meets potential threats with the advent of national test. Through analysis of the classroom teaching and open-ended interviews, we explored the teacher's concerns about the national test and how their science classes have changed to prepare for this test. According to the results, the national test made elementary teachers accountable for the content of their science classes, limits teachers' autonomy in reconstruction of curriculum, and forced teachers to conduct conclusion-centered lessons even in elementary science classes. In addition, teachers argue that the national test precludes the possibility of differentiated education and differentiated assessment. Based on the results, we suggested a new professionalism in this accountability era, so called 'informed professionalism', which refers to the ability of teachers to interpret and implement curriculum and policy mandates at the local, school and classroom level to generate equitable and improved student outcomes through teaching and learning. We also suggested further research on the teacher professionalism in teaching science contents.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.1
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• pp.302-322
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• 2021

In the system of ciphertext policy attribute-based encryption (CP-ABE), only when the attributes of data user meets the access structure established by the encrypter, the data user can perform decryption operation. So CP-ABE has been widely used in personal health record system (PHR). However, the problem of key abuse consists in the CP-ABE system. The semi-trusted authority or the authorized user to access the system may disclose the key because of personal interests, resulting in illegal users accessing the system. Consequently, aiming at two kinds of existing key abuse problems: (1) semi-trusted authority redistributes keys to unauthorized users, (2) authorized users disclose keys to unauthorized users, we put forward a CP-ABE scheme that has authority accountability, user traceability and supports arbitrary monotonous access structures. Specifically, we employ an auditor to make a fair ruling on the malicious behavior of users. Besides, to solve the problem of user leaving from the system, we use an indirect revocation method based on trust tree to implement user revocation. Compared with other existing schemes, we found that our solution achieved user revocation at an acceptable time cost. In addition, our scheme is proved to be fully secure in the standard model.

• Korea Journal of Hospital Management
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• no.spc
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• pp.39-50
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• 2016

This paper discusses the strategic concepts applied to integrated delivery system(IDS). IDS is rooted in vertical integration(VI) and strategic alliance(SA), but only few knows about the theoretical backbone of the IDS. The paper explains how VI and SA applies to IDS, then provides cases of IDS rooted in strategic concepts; Kaiser Permanante Model, Mayo Clinic Model, and ACO(Accountable Care Organizations). Finally the paper provides the implication of IDS on Korean healthcare delivery system.

• Korean journal of communication and information
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• v.41
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• pp.268-302
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• 2008

This paper analyzes an NHK's 'Performances of Reform and Revival'. As a result of analysis, it was focused on reinforcement of the management such as audit, corporate governance, compliance, and thus the accountability was insufficient. Generally speaking, public service broadcasting is the form of organization of mass media that is most directly accountable to society. Therefore, the efforts is required for public service broadcasting to figure out to endow the social roles and responsibilities to themselves differentiated from other commercial broadcasters. And it is necessary that the concrete systems and activities based on an answerability model so that public broadcasters fulfill the accountability. Answerability means that broadcasting organizations and journalists both take account of and are accountable to the public. In such a process, the positive and voluntary civic participation is indispensable.

• Women's Health Nursing
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• v.2 no.2
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• pp.160-181
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• 1996

This study measures the subjectivity(opinions, attitudes) of college women. Identifying the schemata (structure of subjectivity) would be a basic step for the sexual educational program and alternative strategies of sexual harassment. More concretely, those following research questions are focused. 1) The subjective schemata : find out typologies based on the opinions and attitudes toward the sexual harassment. 2) Applications : describe the characteristics of each type. 3) Alternatives : provide suggestion of the alternative strategies for solving the sexual harassment problems of women. Q-Methodological method was used for that purpose. As the research method, Q-statements were collected preliminary to the study of through indepth interviews and a literature review. For the study 34 Q-statements were selected. There were 48 college women as subjects for the research. The 48 college women sorted the 34 statements using the principle of Forced Normal Distribution. The principle of Forced Normal Distribution, which has nine scales to measure the individual opinions, was called. Q-Factor Analysis by using PC Quanl Program to supply the material. According to the outcomes of this study, there were four categories of special opinion about the sexual harassment in college women. The first type is called Blaming offenders type. This type is to hold offenders accountable. The second type is called Preventive alternative strategies type. This type is to take preventive measures. The third type is called Blaming social structure type. This type is to hold the society as a whole responsible. The fourth type is called Blaming victims type. This type is to hold victims accountable. As a result, We not need to change our perspective of women's health problems and need to develop realistic way of caring those women in suffering women's problems. Followings are to be suggested of the alternative strategies for solving the sexual harassment problems. Finally, The result of the study will provide us the clue for developing the sexual educational program and alternative strategies for women's sexual harassment problems.

• Journal of Digital Convergence
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• v.12 no.12
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• pp.303-311
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• 2014

The accountability of cloud service which provides the cloud users with accountable services applies various technologies such as the compliance of service policy, monitoring and auditing, logging, and others. It ultimately intends to provide trustworthy cloud service by determining who is accountable for various problems happened during data processing and service offering. In this paper, we propose a cloud ecosystem formed from the chain of content and DRM Cloud service in order to offer secure and trust DRM cloud service when providing high value-added content service. Besides this, we analyse the requirements of cloud services for content owners and users and then propose some logging information to be recorded for trace of accountability and a structure of tool for monitoring.