• 한국IT서비스학회지
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• 제22권2호
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• pp.71-92
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• 2023

Globally, under the leadership of advanced ICT countries, the private sector is promoting various policies to promote the digital transformation of public services. Looking at the research trend, design of public service indicators, development of evaluation system, and empirical research are being carried out steadily, but there are insufficient research cases on models in which the private sector participates in the planning, development, and operation of public services. In this study, Private-centric digital public service suitability evaluation indicators were discovered through interviews with experts in various fields, and weights for each indicator were analyzed through AHP evaluation. In addition, by applying the analysis results to 18 digital public services on a trial basis, the importance and priority of evaluation indicators for each service were derived, and at the same time, the evaluation framework was designed and applied to diagnose implications. As a result of the study, 'social utility', 'corporate acceptability', and 'public acceptability' were selected as the top three indicators of suitability evaluation. At this time, it was analyzed that the weight of the 'company acceptability' index, which includes sub-indices such as 'service profitability', 'service scalability', and 'private initiative possibility', was the highest among the three top indicators. As a result of the demonstration for public services, "IoT facility unmanned remote monitoring service", "blockchain real estate transaction service", and "digital twin disaster prediction service" were evaluated as the most suitable public services for the transition to the private sector.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권5호
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• pp.2394-2406
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• 2016

ABE has become an effective tool for data protection in cloud computing. However, since users possessing the same attributes share the same private keys, there exist some malicious users exposing their private keys deliberately for illegal data sharing without being detected, which will threaten the security of the cloud system. Such issues remain in many current ABE schemes since the private keys are rarely associated with any user specific identifiers. In order to achieve user accountability as well as provide key exposure protection, in this paper, we propose a key-insulated ciphertext policy attribute based encryption with key exposure accountability (KI-CPABE-KEA). In our scheme, data receiver can decrypt the ciphertext if the attributes he owns match with the self-centric policy which is set by the data owner. Besides, a unique identifier is embedded into each user's private key. If a malicious user exposes his private key for illegal data sharing, his identity can be exactly pinpointed by system manager. The key-insulation mechanism guarantees forward and backward security when key exposure happens as well as provides efficient key updating for users in the cloud system. The higher efficiency with proved security make our KI-CPABE-KEA more appropriate for secure data sharing in cloud computing.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2021년도 제64차 하계학술대회논문집 29권2호
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• pp.679-680
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• 2021

본 논문에서는 개인용 하드웨어를 통해 인증을 강화하고 이를 활용하여 개인 클라우드를 제공할 수 있는 개인용 보안장비인 DONO를 제안한다. 또한 DONO를 활용하여 보다 규모가 확장된 클라우드 서비스를 제안하고 이를 활용하여 실제 서비스가 가능함을 보여주도록 한다. DONO가 사용하는 환경은 기존의 네트워크 시스템을 따르는 대신 콘텐츠 중심의 통신을 통해 면역 기반 보안 시스템을 구축한다. 데이터 전송은 CCN(Content Centric Network)을 통해 이루어지며 CCNx 그룹이 검증한 프로토콜을 활용한다. DONO에 의해 보호되는 영역은 일반적인 네트워크 통신을 사용하지 않고 CCN 프로토콜에 따라서 운영하며 이를 통해 기존의 보안 공격과 추가적으로 알 수 없는 공격으로부터 시스템을 보호할 수 있다. 이러한 새로운 방식을 활용해 클라우드 시스템을 제공하며 보다 안전한 서비스를 활용할 수 있음을 보이도록 한다.

• 정보과학회 논문지
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• 제43권5호
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• pp.596-605
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• 2016

2009년 이후 정부 및 민간부문에서는 DDoS 방어체계 구축을 위해 수백억 원의 예산을 투입해 왔으며, 그 결과 많은 정부 및 민간분야에 DDoS 대응을 위한 전용장비가 설치되었다. 그러나 이러한 기관 역시 DDoS 공격 발생 시 성공적인 방어가 이루어지지 않는 경우가 많은데, 이는 DDoS 대응 장비가 특정 공격 행위에만 대응할 수 있는 시그니처 중심의 방어 구조를 따르고 있기 때문이다. 이에 비해 방어자원 관점의 정책적 대응방법을 통할 경우, 공격 기법과 상관없이 서비스 자원의 가용성 확인을 통하여 시스템 이상여부 및 공격 유형의 종류를 확인할 수 있으며, 공격에 대한 대응 정책 또한 손쉽게 도출할 수 있다. 본 고에서는 기존의 공격 행위 중심의 방어체계에서 벗어나 방어자 관점의 DDoS 탐지 기법을 소개하고, 이를 통해 정책기반 서비스거부공격 대응방안을 제시한다.

• Asia pacific journal of information systems
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• 제20권1호
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• pp.1-31
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• 2010

One of the prominent challenges of e-government identified in developing countries is low level of ICT literacy and skills of e-government users. For those countries at the nascent stage of e-government development, it is crucial to identify and provide e-skills needed from the demand side. However, prior research has mostly focused on the supply side of e-skills, ignoring the consumption side of e-skills. In addition, no user centric approach for e-skills identification and development for e-service consumption, with respect to the stages of e-government development, have been proposed and validated. The purpose of this article is thus to: 1) Identify skills required for e-services utilization by all participants-citizens, public, and private sector employees-involved in G2C, G2B, and G2E e-government relationships respectively; assuming they are consumers of e-government and to 2) Propose and validate an user-centric approach for e-skills identification and development based on stages of e-government utilizing the Delphi method. As a result of the study, a comprehensive list of e-skills (N = 81) was generated. We found that e-skills required for e-service consumption are not merely technical; they include a wide variety of related skills that can be applied to enhancing e-skills. Therefore, the findings can serve as a standard curriculum for training and educating both citizens and government employees in developing countries. Moreover, the findings of this research may also facilitate international organizations in indentifying and measuring citizens' readiness for e-government in terms of e-skills.

• 토지주택연구
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• 제5권3호
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• pp.137-149
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• 2014

The authors derived rental housing policy measures that are appropriate for the current conditions of Korean housing supply and demand based on the confirmation of the issues of Korean rental housing system and reviewing implications from review of cases of foreign countries and these measures can be categorized into linkage with the urban regeneration and multi-functional development, acquisition of financial resources, operational management, policy and institutional aspects. For the expansion of supply of rental housing, it is essential to link the rental housing policy with urban regeneration. To pursue regeneration of underdeveloped areas and expansion of supply of rental housing in line with urban regeneration, more development sites should be added. Further, the rental home policy must be integrated into a new paradigm that includes securing commercial viability and providing various residential conveniences through multi-functional development. In addition, diversification of developers of real estates turning away from the existing framework of policy that has been focused only on the state-led housing supply so that local governments and private sector players can take part in. Next, new options for funding the supply of rental housing must be sought. First, raising financial resources sequentially through cyclical development approach could be considered. Or, various funding schemes including utilizing Tax-increment financing (TIF) based on the local tax revenues that will be accrued after the development projects and supply of rental housing. Or there should be various schemes to raise funds including utilization of TIFs that are based on the revenues that will be realized after the development projects and supply of rental housing, or utilizing REITs where funds can be provided through private sector investments. Also, getting out from the planning practice that focused only on physical expansion of supply of rental housing, continual operational management must be performed even after the development. These activities must be supported through establishment of control tower at the national level and continuous attention must be paid even after the development by developing specialized operational management companies that are led by private sector players. Finally, in addition to the hardware support that is focused on the public rental housing only, software support such as conditional provision of housing voucher or tax exemption for low-income classes should be provided, too. In other words, a shift from policies that are supplier-centric to ones that are customer-centric must take place.