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.

기록되기 전엔 알 수 없는 것들

이경희,김익한,Lee, Kyoung Hee,Kim, Ik Han 한국기록학회 2021 기록학연구 Vol.- No.68

재현은 존재를 인식하는 것부터 시작하고, 기록은 존재의 인식을 가능하게 하는 수단이 된다는 점에서 상호 순환적이다. 인식되지 못하는 존재는 기록이 없고, 그나마의 기록은 왜곡되며, 왜곡된 표상이 대상을 대표하면서 비가시성을 심화한다. 말하지 못하고 재현되지 못하는 존재를 스피박(Spivak)은 서발턴(Subaltern)으로 명명한다. 이 글은 식당여성노동자에 대한 공공기록과 언론보도, 연구물 등을 살펴 그들 기록이 가진 서발턴적 특징과 한계를 밝히고, 서발턴의 기록화를 위해서 고민해야할 지점과 구체적인 역할을 제안한다. 시대와 사회를 담지한 개체이자, 차이적 존재로서 사람 자체가 온전히 기록되어 재현 가능성을 높일 수 있다면, 기록이 가지는 설명책임성은 기관을 넘어 시대와 사회로 확장되고, 개인과 공동체는 정치적 주체로 세워지는 계기가 될 것이다. Representation of an entity starts with recognition of its existence, and recording is mutually circular in that it acts as a means to enable the recognition of the existence. No record is left on an unrecognized entity, record is distorted if any, and the distorted reproduction represents the entity, reinforcing its invisibility. Spivak describes those who cannot speak on their own and cannot be represented as subaltern. This paper examines public record, the media and research records of female restaurant workers, identifies the subaltern characteristics and limitations of their records, and suggests the points to be considered and specific roles required for recording the subalterns. If it is possible to increase the possibility of representation by completely recording a person as an entity that contains the times and society, the accountability of the record to provide an account will extend beyond institutions to the times and society, and individuals and community will be established as political subjects.

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).

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.

Diagnostic Accuracy of Percutaneous Transthoracic Needle Lung Biopsies: A Multicenter Study

이경희,임건영,서영주,허진,Dae Hee Han,강미진,Ji Yung Choo,김채리,Jung Im Kim,윤순호,Woojoo Lee,박창민 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.8

Objective: To measure the diagnostic accuracy of percutaneous transthoracic needle lung biopsies (PTNBs) on the basis of the intention-to-diagnose principle and identify risk factors for diagnostic failure of PTNBs in a multi-institutional setting. Materials and Methods: A total of 9384 initial PTNBs performed in 9239 patients (mean patient age, 65 years [range, 20–99 years]) from January 2010 to December 2014 were included. The accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of PTNBs for diagnosis of malignancy were measured. The proportion of diagnostic failures was measured, and their risk factors were identified. Results: The overall accuracy, sensitivity, specificity, PPV, and NPV were 91.1% (95% confidence interval [CI], 90.6–91.7%), 92.5% (95% CI, 91.9–93.1%), 86.5% (95% CI, 85.0–87.9%), 99.2% (95% CI, 99.0–99.4%), and 84.3% (95% CI, 82.7–85.8%), respectively. The proportion of diagnostic failures was 8.9% (831 of 9384; 95% CI, 8.3–9.4%). The independent risk factors for diagnostic failures were lesions ≤ 1 cm in size (adjusted odds ratio [AOR], 1.86; 95% CI, 1.23–2.81), lesion size 1.1–2 cm (1.75; 1.45–2.11), subsolid lesions (1.81; 1.32–2.49), use of fine needle aspiration only (2.43; 1.80–3.28), final diagnosis of benign lesions (2.18; 1.84–2.58), and final diagnosis of lymphomas (10.66; 6.21–18.30). Use of conebeam CT (AOR, 0.31; 95% CI, 0.13–0.75) and conventional CT-guidance (0.55; 0.32–0.94) reduced diagnostic failures. Conclusion: The accuracy of PTNB for diagnosis of malignancy was fairly high in our large-scale multi-institutional cohort. The identified risk factors for diagnostic failure may help reduce diagnostic failure and interpret the biopsy results.

지혜 깊어지는 건강: 40대 몸을 지키는 요가 -운전 전, 요가로 졸음을 물리치자

이경희,Lee, Gyeong-Hui 한국건강관리협회 2011 건강소식 Vol.35 No.5

누적된 피로와 졸음이 쏟아지는 상태에서 운전대를 잡으면 한순간에 교통사고가 날 수 있다. 운전 전 간단한 동작으로 피로를 풀어보자.

지하공간의 건축계획

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

한국형 친환경수처리 기술 실증연구 및 국내 적용성 검토

이경희,Lee, Gyeong-Hui 한국수자원학회 2020 물과 미래(한국수자원학회지) Vol.53 No.5

교통사고(交通事故) 환자(患者)의 한방치료(韓方治療)와 한양방협진치료(韓洋方協診治療) 비교(比較) 연구(硏究)

이경희,김정은,윤현민,고우신,송춘호,장경전,안창범,김철홍,Lee, Kyoung-Hee,Kim, Jung-Eun,Youn, Hyoun-Min,Ko, Woo-Shin,Song, Choon-Ho,Jang, Kyung-Jeon,Ahn, Chang-Beohm,Kim, Cheol-Hong 대한약침학회 2007 Journal of pharmacopuncture Vol.10 No.3

Objective The purpose of this study is to investigate the difference of treatment effect between Oriental Medicine therapy and Oriental and Western Medicine combination therapy on traffic accident patients. Methods Sixty one traffic accident patients were randomly assigned to the Oriental Medicine therapy group(group I)and Oriental and Western Medicine combination therapy group(group II). Evaluations were made before treatment, after one week treatment and after two weeks treatment using Visual Analog Scale(VAS), Oswestry disability Index(ODI), Neck Disability Index(NDI), Roland Morris Disability Scale(RMDS). The obtained data were analyzed and compared. Results The group I showed significant improvement(p<0.05) according to the VAS, NDI. But that showed insignificant improvement according to the ODI, RMDS. The group II showed significant improvement(p<0.05) according to the VAS, NDI. But that showed insignificant improvement according to the ODI, RMDS. And the difference between the two groups were insignificant according to VAS, NDI, ODI and RMDS. Conclusion There is no significant difference between the two groups after each therapy on traffic accident patients. Further studies are needed for the comparison of the Oriental Medicine therapy and Western Medicine combination therapy.