• 정보보호학회논문지
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• 제24권6호
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• pp.1079-1090
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• 2014

데이터 마이닝은 보유한 데이터를 가공하여 패턴 분석이나 마케팅 등에 활용할 수 있는 유용한 정보를 얻어내는 기술이다. 그러나 이러한 데이터 마이닝 기술을 사용 시 데이터의 제공자의 개인정보가 의도치 않게 유출 될 가능성이 존재하게 된다. 이러한 정보의 유출을 막기 위하여 여러 가지 프라이버시를 보호하는 기법이 연구되고 있다. 수직 분할 데이터는 같은 집단에 관한 데이터가 복수의 소유자에게 나누어 제공되어 있는 상태를 말한다. 이러한 수직 분할된 데이터에서 프라이버시를 보호하면서 k번째 항목과 (k+1) 번째 항목을 score 값을 이용하여 구분하는 방법이 개발되었다. 그러나 기존의 연구에서는 양자간의 환경에서만 사용이 가능하였기 때문에 본 논문에서는 Paillier 암호화 기법을 사용하여, 기존의 연구를 다자간 환경으로 확장한 기법을 제안한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제2권6호
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• pp.312-332
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• 2008

Password-based authentication key exchange (PAKE) protocols in the literature typically assume a password that is shared between a client and a server. PAKE has been applied in various environments, especially in the “client-server” applications of remotely accessed systems, such as e-banking. With the rapid developments in modern communication environments, such as ad-hoc networks and ubiquitous computing, it is customary to construct a secure peer-to-peer channel, which is quite a different paradigm from existing paradigms. In such a peer-to-peer channel, it would be much more common for users to not share a password with others. In this paper, we consider password-based authentication key exchange in the three-party setting, where two users do not share a password between themselves but only with one server. The users make a session-key by using their different passwords with the help of the server. We propose an efficient password-based authentication key exchange protocol with different passwords that achieves forward secrecy in the standard model. The protocol requires parties to only memorize human-memorable passwords; all other information that is necessary to run the protocol is made public. The protocol is also light-weighted, i.e., it requires only three rounds and four modular exponentiations per user. In fact, this amount of computation and the number of rounds are comparable to the most efficient password-based authentication key exchange protocol in the random-oracle model. The dispensation of random oracles in the protocol does not require the security of any expensive signature schemes or zero-knowlegde proofs.

• 정보보호학회논문지
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• 제22권2호
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• pp.225-238
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• 2012

온라인 게임의 다양한 보안 위협 가운데, 온라인 게임 봇의 사용이 게임 서비스에 가장 심각한 문제를 야기하고 있다. 본 논문에서는 온라인 게임 봇 탐지를 위한 소셜 액티비티 분석 프레임워크를 제안한다. 이 프레임워크를 이용하여 게이머의 소셜 액티비티를 가장 많이 포함하고 있는 파티 플레이(party play) 로그를 분석하는 데에 적용하였다. 게임 봇은 일반 사용자들과 다르게, 사이버 자산을 빠르게 얻는데 특화되어 있기 때문에 소셜 액티비티를 분석할 경우 정상적인 사용자들과 행동 패턴에 차이가 있다. 이 특징을 이용하여 게임 봇 이용자와 일반 이용자들을 구분해 낼 수있도록, 사용자 행위를 분석하고 온라인 게임 봇 탐지를 위한 임계값을 정의하였다. 탐지 규칙을 포함하는 지식 기반 시스템을 구축한 뒤 이를 국내 최대, 세계 6위 규모의 게임에 적용하였다. 본 논문의 프레임워크를 활용하여 분류를 한 결과 95.92%의 높은 정확도를 보였다.

• 예술인문사회 융합 멀티미디어 논문지
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• 제8권10호
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• pp.883-893
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• 2018

2004년 고용허가제의 도입과 함께 시작된 외국인 노동자의 유입은 60만 명 수준으로 증가되었다. 하지만 이들의 권리 보장과 처우개선을 위한 제도적 뒷받침은 부족한 실정이다. 이는 한국이 이주노동자를 수용, 통합의 대상이 아닌 일시적 거주자이자 노동력으로 인식하기 때문일 것이다. 그 결과 이주 노동자들의 법적 지위와 권리 보장은 인권 보다는 이들의 활용측면에 치우치고 있으며, 인권적 보호는 미비하다는 비판을 받고 있다. 이러한 상황에서 이 논문은 한국 국회의 다수석을 차지하고 있는 4개 정당(더불어 민주당, 자유한국당, 바른정당, 정의당)의 19대 대통령 선거 공약을 분석하여 이주노동자 정책이 어떻게 전개될 것인지 예측했다. 연구 결과 이주노동자에 대한 정책이 언급되지 않은 정당이 두 곳이었으며, 나머지 두 정당 또한 현재의 정책을 유지하는 선이었다. 이는 이주노동자를 일시적 거주자로 인식하는 것이 가장 큰 원인일 것이다. 하지만 이들도 한국 사회의 구성원이자 보장받아야 할 인권의 소유자임을 주지하고 이들과 함께 살아갈 수 있는 방향의 정책 수립이 고려되어야 할 것이다.

• 동의생리병리학회지
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• 제19권4호
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• pp.860-864
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• 2005

Nowadays most of scholarship is based on the western model. Traditional Chinese Medical education system also follows the western medical education. In the views of medical sociology, it shows very interesting phenomenon that the modernization of traditional area follows the western model of modernization. Moreover, it provides a good chance to discuss whether modernization and westernization of tradition is real development or not. Traditional Chinese Medicine had been the only institutional medicine in China for a long time. But the status of Traditional Chinese Medicine has been changed very rapidly since modern era. Shanghai Traditional Chinese Medical School was established in 1916. But National Party government tried to abolish Traditional Chinese Medicine and it met a crisis of maintenance. But the situation has been dramatically changed when Communist Party got the power in 1949. The Communist Government needed a chief medical service. And Traditional Chinese Medicine could meet the condition. Traditional Chinese Medicine could provide also the ideology of national superiority. Therefore, Traditional Chinese Medicine has been protected and developed by the assistance of the Communist Party. In the process, Traditional Chinese Medical education has been professionalized.

• 한국프랜차이즈경영연구
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• 제14권1호
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• pp.57-74
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• 2023

Purpose: As global interest in environmental issues increases, the demand for green products/services is increasing. Companies are establishing eco-friendly policies to meet the changing expectations of customers. Therefore, this study aims to analyze the effect of eco-friendly behavior and third-party certification on trust, satisfaction, and loyalty as well as the mediating role of satisfaction based on SOR and signaling theory. Research design, data and methodology: This study collected data from 501 respondents who visited restaurant and analyzed using measurement model with SPSS 28.0 and SmartPLS 4. Results: First, restaurants' eco-friendly behavior and third-party certification (TPC) positively influenced trust while these did not influence satisfaction. Second, trust positively influenced satisfaction. Third, trust and satisfaction positively influenced loyalty. Fourth, TPC had stronger impact on trust and satisfaction compared to eco-friendly behavior in female group while TPC had stronger impact on trust in male group. Conclusions: This study emphasized the importance of TPC over eco-friendly behavior. Restaurants should maintain pro-environmental behaviors such as reducing single-use items while obtaining TPC such as ISO and LEED certifications to increase customer trust. It also found the importance of trust and satisfaction in securing loyal customers. Restaurants should make efforts to build bonds with customers through authentic marketing such as events that encourage customer participation.

• 산업경영시스템학회지
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• 제45권4호
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• pp.127-133
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• 2022

Many manufacturers applying third party logistics (3PLs) have some challenges to increase their logistics efficiency. This study introduces an effort to estimate the weight of the delivery trucks provided by 3PL providers, which allows the manufacturer to package and load products in trailers in advance to reduce delivery time. The accuracy of the weigh estimation is more important due to the total weight regulation. This study uses not only the data from the company but also many general prediction variables such as weather, oil prices and population of destinations. In addition, operational statistics variables are developed to indicate the availabilities of the trucks in a specific weight category for each 3PL provider. The prediction model using XGBoost regressor and permutation feature importance method provides highly acceptable performance with MAPE of 2.785% and shows the effectiveness of the developed operational statistics variables.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권4호
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• pp.1404-1423
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• 2015

In smart grid, electricity consumption data may be handed over to a third party for various purposes. While government regulations and industry compliance prevent utility companies from improper or illegal sharing of their customers' electricity consumption data, there are some scenarios where it can be very useful. For example, it allows the consumers' data to be shared among various energy resources so the energy resources are able to analyze the data and adjust their operation to the actual power demand. However, it is crucial to protect sensitive electricity consumption data during the sharing process. In this paper, we propose a fine-grained access control scheme (FAC) with efficient attribute revocation and policy updating in smart grid. Specifically, by introducing the concept of Third-party Auditor (TPA), the proposed FAC achieves efficient attribute revocation. Also, we design an efficient policy updating algorithm by outsourcing the computational task to a cloud server. Moreover, we give security analysis and conduct experiments to demonstrate that the FAC is both secure and efficient compared with existing ABE-based approaches.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 춘계종합학술대회
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• pp.122-125
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• 2005

현재 환경, 교통, 기상 등에서 광범위하게 사용되고 있는 데이터 수집 시스템에서는 임베디드 장비와 통신모듈은 분리되어 사용 되고 있다. 특히 통신 상황이 좋지 않은 원격지에서 수집된 데이터들을 전송하기 위한 데이터 수집 시스템은 구조가 복잡해지고 통신요금도 비싸다. 본 논문에서는 통신상황이 좋지 않은 원격지에서 수집된 데이터를 저렴한 위성 통신을 이용하여 오류 없이 전송할 수 있는 안정화된 시스템을 제안하고자 한다. 그리고 임베디드 보드를 포함하는 위성통신 단말기의 Third-party 프로그래밍을 통해 원격지 데이터 수집 시스템을 간단하게 구성하였다. 마지막으로 수집된 데이터를 웹 에이전트를 통하여 멀티 사용자에게 제공하는 방법도 제안하고자 한다.

• 가족자원경영과 정책
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• 제8권3호
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• pp.1-14
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• 2004

This is a historical study of the tea culture and its manners after checking the origin of the tea culture in Korea. Also I created the Blooming Lotus Pond Tea which can be utilized in various meetings or at homes in connection with the tea culture and etiquette by studying good manners, clothing and light refreshments in 'Kyucongyogyul' by Lee-E, 'Karyejibramdo' by Kim Jang-Seng and other books of the Chosun Dynasty. I created the Blooming Lotus Pond Tea by referring to the tea-ceremonies described in the poems by Hong Inmo, his wife, Lady Suh, and her descendants. They can be better harmonized with the modem tea culture rather than the strict procedures of traditional court ceremonies or marriage, funeral, and other formal tea ceremonies. About the costumes of the nobilities, that is especially referred to Kyukmongyogyul by Lee-I of the Chosun Dynasty for the etiquette, also 'The Living Manners' by Professor Lee Gilpyo and Choi Baeyong. In addition, the tea-food is made based on 'the five elements'. The Blooming Lotus Pond Tea is made of frozen lotus flowers and prepared in the lotus formed broad-rimmed tea-utensils and supposed to be shared with family members or guests. It's recommended to hold a poetry-party with a tea-party. At present, this kind of daily tea ceremony is being developed at homes. It'll be desirable if it could recreate the traditional way as a ceremonial tea culture. In that case, it'll regain the quality of the traditional etiquette by harmonizing tea culture and manners. Such a tea culture can contribute to the quality of people's ordinary life and the identity of our country.