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.

저울과 칼

이경희,Lee, Gyeong-Hui 한국대학교육협의회 1996 大學敎育 Vol.79 No.-

정신 Nylon 6 섬유의 미결정 및 배향도 변화에 관한 연구

이경희,장동호,박판석,Lee, Gyeong-Hui,Jang, Dong-Ho,Park, Pan-Seok 한국섬유공학회 1975 한국섬유공학회지 Vol.12 No.3

The crystallite size and the orientation of nylon 6 filaments, drawn at the various draw ration (2, 3, 4, & 5) and various temperatures (20, 60, 100, & 140℃), were studied by X-ray diffraction method. The crystallite size was calculated by Scherrer's method and orientation was measured by Warwicker's szimuthal angle at the half width of the maximum intensity (ؽ). The crystallite size of 020 plane (fiber axis) increased with the increase of draw ratios up to 4, remarkable crystallite growths being found in the samples treated at 140℃, whereas significant changes in the crystallite size of 200 plane(┴ fiber axis) could not be found. The crystallite orientation in fiber axis increased with the increase of draw ratio, and the remarkable increase of orientation was noted in the samples treated at 20℃(belowTg).

IPTV2.0 서비스를 위한 네트워킹 기술

이경희,윤장우,류원,김봉태,Lee, Kyounghee,Yoon, Changwoo,Ryu, Won,Kim, Bongtae 대한임베디드공학회 2008 대한임베디드공학회논문지 Vol.3 No.4

The convergence of broadcasting and telecommunication services is being accelerated by broadband networks, digital broadcasting and Web2.0. This paper describes the definition and service characteristics of IPTV as a representative of broadcasting and telecommunication convergence services. Especially, the changes of infrastructure and technology for IPTV2.0 are addressed in terms of the service features of mobility, intelligence and participation. IPTV2.0 shall be characterized by the open IPTV service based on Web2.0 and the mobile IPTV service over the heterogeneous networks employing various wireless/wired access technologies. The IP Multimedia Subsystem (IMS) and Service Delivery Platform (SDP) technologies are increasingly considered to support the personalization and openness. The mobility management technology is being evolved to provide QoS-guaranteed mobile communication services to users at anytime and anywhere. IPTV2.0 services and platforms are also anticipated to be core components to achieve knowledge-based ubiquitous society. IPTV2.0 contents are required to be integrated with the enhanced metadata to efficiently support search, selection, convergence and delivery of the contents. Moreover, those contents shall be enhanced to provide the scalable services which is adaptable to the network status and user preferences. Therefore, the networking technologies for IPTV2.0 should tightly cooperate with application services and adaptive contents. Those technologies will be developed to construct the ubiquitous content service platform considering the evolution of networks and various converged services.

육종의 새로운 분자생물학적 치료

이경희,Lee, Kyung-Hee 대한근골격종양학회 2005 대한골관절종양학회지 Vol.11 No.1

물리치료과 학생의 자아개념과 정신건강에 관한 연구

이경희,김기원,Lee, Kyung-Hee,Kim, Gi-Won 대한물리치료학회 2008 대한물리치료학회지 Vol.20 No.4

Purpose: To investigate the relationship between self-concept and mental health of physical therapy students. Methods: We recruited 179 currently enrolled college freshman, sophomores, and juniors studying physical therapy. The instruments used for this study were Rosenberg's Self-esteem Scale, Choi Chung Hoon's Perceeptual Orientation Scale, and the Mental Health Test modified by Lee. Results: The mean self-concept score was 3.97, a positive self concept, and the mean mental health score was 1.04. The mean dimension score for mental health ranged from: r=0.79$\sim$r=1.29. The relationship between self-concept and the mental health showed a negative correlation (r=-0.693, p<0.01). Conclusion: Modifications to the current program may improve self-concept and the mental health of physical therapy students.

윈도우 커버링용 PET 난연 직물의 마모 및 역학특성

이경희,전연희,안승국,Lee, Kyung Hee,Jeon, Youn Hee,An, Seung Kook 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.2

This study examined the abrasion and mechanical properties of poly(ethylene terephthalate) (PET) flameretardant fabrics used for window coverings. The tensile linearity, tensile resilience, bending rigidity, bending hysteresis, shearing stiffness, shearing hysteresis, compression energy, and surface roughness all increased with increasing fabric density and cover factor ratio. Five samples were subjected to more than 16,000 cycles for the abrasion resistance test and to grade 4 for the snagging test. The drape test showed that the flexibility of the samples was affected by fabric density and cover factor ratio.

우리나라 태풍피해 현황 및 태풍대응시스템 체계

이경희,차을준,이태식,조원철,Lee,Kyung-Hi,Cha,Eul-Jun,Lee,Tae-Shik,Cho,Won-Cheol 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

올란자핀의 체중증가 부작용 발생율 및 체중변화량

이경희,스리니바산샨무감,렌가라잔바스카란,산토쉬쿠마르나가야스리라만,용철순,최한곤,우종수,유봉규,Lee, Kyung-Hee,Shanmugam, Srinivasan,Baskaran, Rengarajan,Nagayya-Sriraman, Santhoshkumar,Yong, Chul-Soon,Choi, Han-Gon,Woo, Jong-Soo,Yoo, Bong-Kyu 대한약학회 2008 약학회지 Vol.52 No.4

Olanzapine, an atypical antipsychotic, has been widely used for the treatment of schizophrenia and bipolar disease. Although olanzapine is less associated with extrapyramidal symptoms and neuroleptic malignant syndrome compared to existing typical antipsychotics, the use of this drug has a problematic side effect of weight gain, which may cause metabolic syndrome such as type 2 diabetes. However, there are few hospitals practicing body weight monitoring of the patients on olanzapine or other atypical antipsychotics. The goal of this study was to identify the incidence and severity of weight gain associated with the use of the drug in Korea. We performed body weight monitoring of the patients who were on the drug in a hospital setting. Mean of the weight gain (as of one-month-transformation) was 4.33 and 3.39 kg for the male and female patients, respectively. The incidence in the young patients was higher than that observed in the old patients, and the severity was the highest in patients in their thirties followed by twenties or younger. This result suggests that the pattern of the weight gain associated with the use of olanzapine in Korea is similar to the reports performed and documented in US and European countries. Therefore, it appears that healthcare professionals in Korea should also watch on the weight gain issue in patients who are on olanzapine or other atypical antipsychotics.