Matchmaker : Fuzzy Vault Scheme for Weighted Preference

Tuvshinkhuu Purevsuren(툽신후),Jeonil Kang(강전일),DaeHun Nyang(양대헌),KyungHee Lee(이경희) 한국정보보호학회 2016 정보보호학회논문지 Vol.26 No.2

Juels와 Sudan의 퍼지 볼트 기법은 기법이 갖는 오류 내성 때문에 많은 연구에 사용 되어오고 있다. 그러나 이들의 퍼지 볼트 기법은 그들의 논문에서 영화 애호가 문제를 예를 들었음에도 불구하고, 사람들이 일반적으로 갖는 선호도(preference)의 차이에 대한 고려가 존재하지 않는다. 한편, Nyang과 Lee는 안전하고 성능이 좋은 얼굴인증 시스템을 만들기 위해서, 얼굴 특징이 서로 다른 가중치를 갖도록 얼굴 특징과 퍼지 볼트(vault) 사이에 특별한 연관 구조를 갖는 얼굴 인증 시스템(이른바, 퍼지 얼굴 볼트)을 소개하였다. 그러나 그들의 기법은 일반적인 특징 추출 기법들이 클래스 내부/간 차이를 최적화하려는 특성이 있기 때문에 인증 실패율을 성공적으로 낮추지 못할 것으로 쉽게 예상할 수 있다. 이 논문에서는 퍼지 볼트의 유연성을 제공해주기 위하여 Nyang과 Lee의 퍼지 볼트기반의 얼굴 인증 시스템에서 가중치 아이디어를 다른 방식으로 구현한 버킷(bucket) 구조와 사용자 선호도와 시스템 구현 간 관계를 공식화하는 세 가지 분포 함수에 대해서 소개한다. 또한 이를 바탕으로 선호도 매치메이커(preference matchmaker) 기법을 제안하며, 영화 데이터베이스를 이용하여 이러한 매치메이커의 연산 성능을 확인해본다. Juels and Sudan’s fuzzy vault scheme has been applied to various researches due to its error-tolerance property. However, the fuzzy vault scheme does not consider the difference between people’s preferences, even though the authors instantiated movie lover’ case in their paper. On the other hand, to make secure and high performance face authentication system, Nyang and Lee introduced a face authentication system, so-called fuzzy face vault, that has a specially designed association structure between face features and ordinary fuzzy vault in order to let each face feature have different weight. However, because of optimizing intra/inter class difference of underlying feature extraction methods, we can easily expect that the face authentication system does not successfully decrease the face authentication failure. In this paper, for ensuring the flexible use of the fuzzy vault scheme, we introduce the bucket structure, which differently implements the weighting idea of Nyang and Lee’s face authentication system, and three distribution functions, which formalize the relation between user’s weight of preferences and system implementation. In addition, we suggest a matchmaker scheme based on them and confirm its computational performance through the movie database.

최근 제안된 두 그룹서명기법의 암호분석

하등과(DengKe Ha),김기태(KiTae Kim),양대헌(DaeHun Nyang),이경희(KyungHee Lee) 한국정보보호학회 2010 정보보호학회논문지 Vol.20 No.5

연결불가능성(unlinkability)과 추적불가능성(traceability)은 그룹서명이 만족해야 하는 기본적인 요구사항이다. 본 논문에서 최근 Lee등과 Zhu등에 의해서 제안된 두 그룹 서명기법들이 갖는 취약점을 분석하였다. Lee등의 기법은 합법적인 서명자가 생성한 서명을 검증할 수 없는 설계상의 치명적인 문제를 갖고 있으며, 검증과정이 안고 있는 문제와 별개로 동일한 서명자가 생성한 서명을 항상 링크할 수 있음을 보인다. 또, Zhu등의 그룹서명기법에서 그룹의 관리자가 추적할 수 없도록 서명을 생성하는 것이 가능함을 보이고, 저자들의 주장과 달리, 그들의 기법이 전방향 안전성을 만족하지 않음을 보인다. Unlinkability and traceability are basic security requirements of a group signature scheme. In this paper, we analyze two recent group signature schemes, Lee et al.'s scheme and Zhu et al.'s scheme. We show that Lee et al.’s scheme does not work correctly. Further, it fails to meet unlinkability, that is, anyone who intercepts or receives group signatures are able to check if they are from the same signer. We also show that Zhu et al.'s scheme is unable to satisfy traceability, that is, a malicious group member can generate valid group signatures that cannot be opened. Moreover, once becoming group member, the malicious group member will never be revoked from group. Besides, Zhu et al.'s scheme fails to satisfy forward security, a requirement claimed by authors.

복소 포텐셜을 이용한 로봇 축구용 다개체 로봇의 경로 계획

이경희,김동한,류근호,Lee, Kyunghee,Kim, Donghan,Rew, Keun-Ho 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.12

This paper deals with the trajectory planning of multi agent robots using complex potential theory for robot soccer. The complex potential theory is introduced, then the circle theorem is used to avoid obstacles, and the vortex pair is used to make precise kicking direction of robot. Various situations of robot soccer are simulated and the effect of vortex strength and the speed of robots are discussed and the better way to avoid obstacles and to kick the precise direction is found. The feasibilities of complex potential theory to apply for the multi agent robots are successful.

무용예술에서의 라반동작분석법의 총체적 의의

이경희,Lee, Kyunghee 성균관대학교 트랜스미디어연구소 2019 트랜스- Vol.6 No.-

학문적인 연구를 위한 목적으로 사용되는 라반 동작분석법(Laban Movement Analysis)의 핵심은 움직임을 통한 개인의 심리 또는 정서 상태는 내적의도에 의해 외적인 움직임으로 표현되며, 그것은 내면 정서의 상징성을 띠고 있다는 것으로부터 출발한다. 또한 라반동작분석법은 움직임의 대상의 구조가 어떠했는지, 그 구조를 과거 또는 다른 구조와 비교 분석적으로 해석하는데 중점을 두며, 분석된 춤의 문법들은 궁극적으로 심리적·사회적·문화적인 다양한 측면에서 서로의 '관계성' 찾을 수 있는 단서를 제공한다. 또한 춤의 '순간성'으로부터 함의된 시스템용어로 기록의 자원을 제공하고, 그것은 다학적인 연구자료로서 교육적 가치를 지닌다.

트라우마 치유를 위한 소매틱 익스피리언싱 (Somatic Experiencing®)의 신체적 함의 - 다미주 신경이론 중심으로 -

이경희 ( Lee Kyunghee ) 무용역사기록학회 2020 무용역사기록학 Vol.59 No.-

This study aims to understand Somatic Experiencing® which is a trauma healing technique through the senses of the body, and how humans are neurophysiologically connected to the autonomic nervous system in the process of recognizing the senses and react to survival. I examine whether it has an emotional release and how the trauma can be healed through the senses of the body. To this end, I investigate the survival and defensive behavior of wild animals, which is the core concept of Peter Levin's trauma healing, and discuss in terms of neurophysiology. As a result, I identify the physical implications of somatic experience based on neurophysiology. First, trauma is something that can be experienced willingly and is a natural and normal part of life. Second, for trauma healing, the intervention of the brain's neocortex is important. Through neocortical intervention, it is possible to focus on the body sensations and integrate the three-layered brain structure. Third, activation of the vagus nerve, which is closely related to our emotional response and social relationship, plays an important role in bringing about stabilization.

북한의 물 거버넌스 변화 연구 : 북한과 유니세프의 물 협력 실증 분석을 중심으로

이경희(Kyunghee Lee) 한국국제정치학회 2019 국제정치논총 Vol.59 No.3

This study examines North Korean water tragedies and attempts to find alternatives that can go beyond the tragedy. The process, like the expression of E. Ostrom, a political scientist who studied water and a Nobel laureate in economics, focuses on the phenomena that appear in “now-here” and requires imagination to extend the practical realm of “cautious” experience to the time and space of the future. The diagnosis and prescription of North Korean water problems is an extension of the global agenda of ‘Who can overcome the tragedy of sharing?’ The solutions beyond tragedy are summarized in T. Hobbes’ Leviathan, the ‘state’ or ‘market’ by his successor, G. Hardin, or Ostrom’s ‘polycentric governance’, which resists this dichotomy. North Korea can be seen as a cautious example in support of Ostrom’s alternative in that has embraced a new order of polycentric governance, continuously cooperating with UNICEF for water problem after requesting support from the international community for serious floods in 1995. North Korea has been implementing a water supply system, which is a state-based water management system. However, in order to cope with the Octangle, the United Nations coordination system for development cooperation, it has been practicing polycentric governance in cooperation with various actors connected by horizontal networks. North Korea’s change is inevitable because this process is not only accompanied by a structural reorganization of the decision-making system, but also requires internal power groups to enjoy the democratic values that “poly-center” holds. An attempt to view North Korea’s changes from a new perspective of water governance change through the tragedy of North Korean shared resources via water, can be an opportunity to reconsider the implications of water resources for North Korea. Furthermore, the demonstration of North Korea’s changes led by cooperation so far also contains a desire that we should imagine future cooperation, not just read the present.

한국인 영어학습자의 영어 모음 발화 분석 : 음향 분석과 발화이해도에 관한 비교 연구

이경희(Lee, Kyunghee),이신숙(Lee, Shinsook) 한국영어학학회 2021 영어학연구 Vol.27 No.2

This study examined Korean ESL (English as a Second Language) learners’ production of English vowels (/i/, /ɪ/, /ɛ/, /æ/, /ɑ/, /ʌ/, /ɔ/, /u/), focusing on the acoustic properties of the vowels and speech intelligibility. Twenty-three Korean ESL learners, divided into two groups based on their English-learning experiences (high-proficiency group vs. intermediate-proficiency group), completed a vowel production task in which the first and second formant values (F1, F2) of vowels were measured and compared to the productions of native English speakers. Another group of native English listeners evaluated the speech intelligibility of Korean ESL learners’ production of English vowels. Furthermore, the correlation between the acoustic properties of the English vowels and speech intelligibility was investigated. The results showed that F1, F2 distribution patterns and speech intelligibility patterns were somewhat different according to the native English speaker group, the high-proficiency group, and the intermediate-proficiency group. The acoustic properties, especially F1, tended to influence the speech intelligibility but the correlation between them was varied according to vowel types and Korean ESL learners’ English-learning experiences.

스마트기기 의존도에 따른 초등학생의 학교적응과 학업수행능력 차이 분석

이경희(KyungHee Lee),박혜영(Hye-Young Park) 한국컴퓨터정보학회 2022 한국컴퓨터정보학회논문지 Vol.27 No.4

The purpose of this study is to find methods to prevent and improve smart device over-dependence problems by analyzing differences in school life adaptation and academic performance according to children’s dependence on smart devices. For this, the data of fifth grade elementary school students in the 12th year were extracted and utilized from Panel Survey of Korean Children. The data were analyzed using non-hierarchical cluster(K-means) analysis, T-test, one-way ANOVA, and Scheffé tests. The results of this study are as follows. First, It has been shown that dependence on smart devices, school adaptation and academic performance have a negative correlation. Second, students in potential and high-risk groups who are highly dependent on smart devices have significantly lower school adaptation compared to those in the safety group. Third, high-risk students showed significantly lower academic performance compared to those in the potential risk group and general group. Based on these findings, it was suggested that for elementary school students who rely on smart devices, various learning support and national efforts such as counseling for school life adaptation are needed.

정신질환의 `업무상` 재해 인정 기준

이경희(Kyunghee Lee) 한국고용노사관계학회 2016 産業關係硏究 Vol.26 No.3

산재보험법제는 업무상 질병으로 적응장애와 우울병 에피소드를 신설하는 등 입법정책적 대안을 마련하고 있다. 그러나 심리적 부하는 원인의 복합성과 질환의 증상이나 경과 등 결과의 다양성으로 인해 구체적 사건에 대한 처분 및 판정이나 판결은 여전히 쉽지 않다. 이 같은 업무상 정신질환에 관한 사례들에서 본고는 새로운 쟁점을 다음과 같이 축약하고, 이에 관한 문제들에 대한 법적 판단기준을 모색해 보았다. 첫째, 산재보험급여는 인과적 급여로 제한되어야 함에도, 현행법상 업무상 질병으로서 다양한 정신과 질병들이 포함 또는 인정될 수 있는 근거 법리는 무엇인가. 나아가 정신질환의 특성에 따라서는 발병과 재발 또는 치료상태나 유지상태가 반복되는 등 다양한 경과를 보이는 경우, 과연 산재보험법상 재해의 발생과 유무 즉, 발병 시점은 언제인가. 특히 기존에 정신질환이 있었던 경우, 신청질병의 발병 여부와 발병 시기는 어떻게 판단할 것인가. 이에 대해 본고는 재해의 존재라는 필요불가결 인정요건으로서 특히 기존 질환의 경우 발병 시점의 판단기준을 논하였다. 둘째, 심리적 부하의 업무관련성과 부하의 평가 특히 기존 정신질환의 악화에 대한 업무기인성이 인정되는 충격적인 사건의 범위는 어디까지인가. 업무상 부하로 인한 정신질환의 ‘악화’는 경과의 예측에 근거한 의학적 판단만으로 충분치 않은 경우, 법적 판단마저 과거 질병의 ‘재발’인지, 이미 발병된 질환의 자연적 경과를 넘는 ‘악화’인지 판단이 쉽지 않다. 본고는 이에 대하여 산재보험이 보호하는 피보험행위로서의 일상적 업무와 충격적 사건들의 업무상성 판단기준을 살펴보고자 한다. 더불어 발병 후 악화된 정신질환에 대한 업무기인성에 대한 판단지침과 판정내용 및 판례들에서 엿볼 수 있는 문제점을 검토하였다. Recently, Korean Industrial Accident Compensation Insurance Act (hereinafter ‘IACIA’) has prepared a legislative alternative plan by regulating new work-related mental disorders such as an adjustment disorder. However, the cause of psychological load (stress) is complicated, and the symptom and progress of mental illness are also diverse. Therefore, the measures or decisions of Korea Workers’ Compensation and Welfare Service and judgments of the Court with regard to the specific cases are not easy. The paper found key issues in the recent cases as below, and pondered the criteria to these questions. First, what are the grounds of legal principles that various psychiatric illness can be recognized as work-related accidents in IACIA? Furthermore, depending on the nature of mental disorders, a wide range of progresses such as occurrence, relapse and repeated maintaining condition of disease are revealed. In this case, how do we acknowledge the start of disease, which means when to occur work-related accidents in IACIA? In particular, when someone has own existing mental disorder, what are the criteria to determine the start of work-related disease? Second, how to determine the degree of relations with duty’s underlying cause that imposes psychological burden? Particularly, the ‘aggravation’ of work-related mental disorder is not easy medically to predict the progress as well. Thus the Court also has difficulty in concluding whether it is related to the ‘relapse’ of past disease or to the ‘radical aggravation’ of existing disease. Based on the above, this paper examined whether mental illness exists or not as legal requirements of work-related accidents, more specifically, the judgements related to existing disease. In addition, in the case of when the existing mental illnesses get worse, this paper also investigated the problems with the guideline judgements of Korea Workers’ Compensation and Welfare Service, contents of judgement of Workers’ Compensation Insurance Eligibility Review Commission, and the recent decisions of the Court.

도덕과 자유학기제 실시 현황 및공동체교육으로의 가능성 모색

이경희(Kyunghee Lee) 성신여자대학교 교육문제연구소 2016 교육연구 Vol.67 No.-

본 논문의 목적은 자유학기제 전면 실시 후 도덕과의 자유학기제 실시 현황 및 점검을 통해 자유학기제도 전반에 대한 문제점을 지적하고 자유학기제 정착을 위한 현장체험학습의 바람직한 대안으로 공동체교육, 즉 마을공동체교육의 가능성을 모색하는 것이다. 아울러, 교원양성기관인 사범대학과 지역사회 중학교를 연계한 자유학 기제 현장체험 맞춤형 교육과정을 위한 수업 모형 개발의 필요성에 대하여 제안하고 있다. The purpose of The purpose of this thesis is to investigate the problems of the free semester system in general and to explore the possibilities of village community education as a desirable alternative to the field experience learning through the current status and review of the implementation of the free semester system with moral education. Furthermore, we will propose the necessity of developing a teaching model for customized curriculum that integrates teacher - college -community middle school as a teacher education institution.