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.

논문편 : 식품표시에 대한 소비자 행동 연구

이경희,여정성 ( Kyung Hee Lee,Jung Sung Yeo ) 대한가정학회 1996 Human Ecology Research(HER) Vol.34 No.5

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.

0.1% 클로르헥시딘과 탄툼액을 이용한 구강간호가 기관내관을 삽입한 중환자실 환자의 구강상태 및 구강내 세균 발생에 미치는 효과

이경희,박해경,김지혜,Lee, Kyung-Hee,Park, Hae-Kyung,Kim, Ji-Hye 한국중환자간호학회 2010 중환자간호학회지 Vol.3 No.2

Purpose: The purpose of this pilot study was to investigate the effect of oral care using 0.1% chlorhexidine and tantum solution on oral status and incidence of oral pathogens among intubated ICU patients. Methods: The study subjects were 26 intubated patients of MICU in a university hospital. Oral care was provided with 0.1% chlorhexidine solution to the experimental group (n=12) and with tantum solution to the control group (n=14), 3 times a day for 6 days. After the intervention, the oral status of each subject was checked using structured method, and oral swab culture was done to count colonized bacterial pathogens. Results: The mean oral status score of experimental group was significantly higher than that of control group (U=42.50, p=.031). The mean incidence of oral pathogens in experimental group was smaller than that of control group, but the difference was not statistically significant. Conclusion: The oral care with 0.1% chlorhexidine solution is more effective than with tantum solution for improving oral status of intubated ICU patients. However, additional studies with larger sample size will be needed to figure out it's effects on the incidence of oral pathogens.

치과교정여부에 따른 치과협조도에 영향을 미치는 요인 연구

이경희,박한빛,용희연,이지희,최다인,현혜민,정은서,Lee, Kyeong-Hee,Park, Han-Bit,Yong, Hee-Yeon,Lee, Ji-Hee,Choi, Da-In,Hyeon, Hye-Min,Jung, Eun-Seo 한국치위생학회 2017 한국치위생학회지 Vol.17 No.4

Objectives: This study aims to investigate patient cooperation for dental treatments by dividing patients into two groups with different treatment categories, i.e. orthodontic patients versus non-orthodontic patients. Methods: On December 2016, the study conducted survey targeting 311 orthodontic or non-orthodontic patients who are 20 years old or older living in Seoul and Gyeonggi-do, South Korea. The study subject were informed with the adequate information of the study and signed consent forms. Except for the questionnaire copies from 23 respondents whose answers were insincere those from 288 respondents, equivalent to 92.6% of the data collected, were used in the present analysis. Results: This review intended to clarify any factors affecting patient cooperation for dental treatments shows that the perception of oral condition, the reliability of dentistry, and the patient preventive cooperation had an effect on patient cooperation for dental treatments. Conclusions: The results summarized above suggest orthodontic patients who are familiar with dental treatments by virtue of their regular visits to dental clinics have higher cooperation for dental treatments compared to non-orthodontic patients, and the higher reliability of dentistry leads to higher patient cooperation for dental treatments.

폐암세포주에서 PS-341에 의한 아포프토시스에서 JNK와 GSK-$3{\beta}$의 역할 및 상호관련성

이경희,이춘택,김영환,한성구,심영수,유철규,Lee, Kyoung-Hee,Lee, Choon-Taek,Kim, Young Whan,Han, Sung Koo,Shim, Young-Soo,Yoo, Chul-Gyu 대한결핵및호흡기학회 2004 Tuberculosis and Respiratory Diseases Vol.57 No.5

연구배경 : PS-341은 최근에 개발된 강력하고 특이적인 proteasome 억제제로서, 일부 암환자에 투여하여 좋은 성적이 보고되고 있다. Proteasome 억제제의 항암효과는 아포프토시스 유발 물질, 즉 p53, $p21^{WAF/CIP1}$, $p27^{KIP1}$, NF-${\kappa}B$, Bax, Bcl-2 등의 발현 증가와 관련이 있는 것으로 생각되고 있다. JNK와 GSK-$3{\beta}$도 아포프토시스에 관여하는 것으로 잘 알려져 있지만, PS-341에 의한 아포프토시스에서의 역할은 규명되지 못한 상태이다. 본 연구에서는 폐암세포주에서 PS-341에 의한 아포프토시스에서 JNK와 GSK-$3{\beta}$의 역할을 규명하고자 하였다. 방 법 : NCI-H157과 A549 폐암세포주를 실험에 사용하였다. 세포생존능은 MTT 방법으로 평가하였고, 아포프토시스는 PARP의 분해로 평가하였다. JNK의 활성도는 in vitro immuno complex kinase 방법과 내인성 c-Jun의 인산화로 측정하였다. 각종 단백의 발현은 Western 분석으로 평가하였다. JNK1과 GSK-$3{\beta}$의 과발현은 각각 plasmid vector와 adenovirus vector를 이용하였다. 결 과 : PS-341 처치로 아포프토시스에 의한 세포생존율의 감소가 관찰되었다. PS-341 처치로 JNK가 활성화되었고, c-Jun의 발현이 유도되었다. Dominant negative JNK1의 과발현 또는 SP600125 전치치로 JNK의 활성화를 차단하면 PS-341에 의한 아포프토시스가 억제되었다. PS-341 처리로 JNK 활성화에 의존적으로 caspase 3의 활성화가 유도되었다. Caspase 활성화의 차단으로도 PS-341에 의한 아포프토시스가 억제되었다. PS-341에 의해 Akt가 활성화되었고, Akt 활성화의 차단으로 PS-341에 의한 아포프토시스가 심화되었다. PS-341에 의한 Akt 활성화로 GSK-$3{\beta}$가 불활성화되었다. Constitutively active GSK-$3{\beta}$의 과발현으로 PS-341에 의한 아포프토시스가 심화되었고, dominant negative GSK-$3{\beta}$의 과발현으로 PS-341에 의한 아포프토시스가 감소되었다. Lithium chloride 전처치와 dominant negative GSK-$3{\beta}$의 과발현으로 PS-341에 의한 JNK의 활성화와 c-Jun의 발현 증가가 억제되었다. 결 론 : 폐암세포주에서 PS-341에 의한 아포프토시스는 JNK/caspase 경로가 관여하며, 이는 PI3K/Akt 경로를 통한 GSK-$3{\beta}$의 불활성화에 의해 억제되는 것으로 판단된다. 따라서 PS-341의 항암효과를 최대화하기 위해서는 PI3K/Akt 경로를 통한 GSK-$3{\beta}$의 불활성화를 차단하는 치료법이 병행되어야 할 것으로 판단된다. Background : PS-341 is a novel, highly selective and potent proteasome inhibitor, which showed cytotoxicity against some tumor cells. Its anti-tumor activity has been suggested to be associated with modulation of the expression of apoptosis-associated proteins, such as p53, $p21^{WAF/CIP1}$, $p27^{KIP1}$, NF-${\kappa}B$, Bax and Bcl-2. c-Jun N-terminal kinase (JNK) and glycogen synthase kinase-$3{\beta}$ (GSK-$3{\beta}$) are important modulators of apoptosis. However, their role in PS-341-induced apoptosis is unclear. This study was undertaken to elucidate the role of JNK and GSK-$3{\beta}$ in the PS-341-induced apoptosis in lung cancer cells. Method : NCI-H157 and A549 cells were used in the experiments. The cell viability was assayed using the MTT assay and apoptosis was evaluated by proteolysis of PARP. The JNK activity was measured by an in vitro immuno complex kinase assay and by phosphorylation of endogenous c-Jun. The protein expression was evaluated by Western blot analysis. Dominant negative JNK1 (DN-JNK1) and GSK-$3{\beta}$ were overexpressed using plasmid and adenovirus vectors, respectively. Result : PS-341 reduced the cell viability via apoptosis, activated JNK and increased the c-Jun expression. Blocking of the JNK activation by overexpression of DN-JNK1, or pretreatment with SP600125, suppressed the apoptosis induced by PS-341. The activation of caspase 3 was mediated by JNK activation. Blocking of the caspase 3 activation suppressed PS-341-induced apoptosis. PS-341 activated the phosphatidylinositol 3-kinase (PI3K)/Akt pathway, but its blockade enhanced the PS-341-induced cell death via apoptosis. GSK-$3{\beta}$ was inactivated by PS-341 via the PI3K/Akt pathway. Overexpression of constitutively active GSK-$3{\beta}$ enhanced PS-341-induced apoptosis; in contrast, this was suppressed by dominant negative GSK-$3{\beta}$ (DN-GSK-$3{\beta}$). Inactivation of GSK-$3{\beta}$ by pretreatment with lithium chloride or the overexpression of DN-GSK-$3{\beta}$ suppressed both the JNK activation and c-Jun up-regulation induced by PS-341. Conclusion : The JNK/caspase pathway is involved in PS-341-induced apoptosis, which is negatively regulated by the PI3K/Akt-mediated inactivation of GSK-$3{\beta}$ in lung cancer cells.

지하공간의 건축계획

이경희,Lee, Gyeong-Hui 한국설비기술협회 1994 설비 : 공조ㆍ냉동ㆍ위생 Vol.11 No.1

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).

A review of the effects of environmental enrichment on stroke in animal experimental models

이경희,황기철,Lee, Kyoung-Hee,Hwang, Ki-Chul The Society of Digital Policy and Management 2014 디지털융복합연구 Vol.12 No.8

The purpose of this article is to present the environmental enrichment(EE) method used to improve the functional recovery and change of brain plastic in animal experimental models of stroke. In animal experimental models of stroke, the environmental enrichment is effective in altering the morphological, biochemical and behavioral characteristics of the brain and thereby improving the functional outcomes. In this review article, we address the effects of EE in achieving a functional recovery in animal experimental models of stroke, thus attempting to describe them in patients with stroke from both occupational and rehabilitation perspectives. 본 연구의 목적은 뇌졸중 동물 실험 모델에서 환경 강화는 기능 회복을 향상 시키고 이로 인하여 뇌에 형태학적, 생화학과 행동에서 특징적인 변화와 그 효과들을 소개하고, 뇌졸중 환자에 환경 강화의 적용은 재활치료 및 작업치료를 포함한 다양 치료와 전 임상 실험의 중요성을 설명하고자 한다. 이 종설 논문에서는 주로 뇌졸중 동물 실험 모델에서 환경 강화로 인한 기능적 회복에 대한 효과와 신경 친화성 물질, 특정 단백질의 발현 및 임상 적용 사례 등의 연구 결과들을 소개하였다. 마지막으로 임상에서 뇌졸중 환자에게 환경 강화의 적용 가능성과 작업치료 및 재활치료의 관점에서 설명하였다.