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USN환경에서 2단계 사용자 인증을 이용한 침입 방지 방안
김원영,이영석,김선진,방효찬,Kim, Won-Young,Lee, Young-Seok,Kim, Sun-Jin,Bang, Hyo-Chan 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.1
본 논문에서는 이기종 무선 센서들이 포함된 USN 환경에 적합한 보안성과 확장성을 갖춘 사용자 인증 방식을 갖는 침입 방지 방안을 제안한다. 본 연구에서 제안하는 사용자 인증 방식은 공용키 암호 방식과 비밀키 암호 방식을 모두 사용하고, 두 방법의 장점들을 활용하는 인증방식이다. 본 논문에서는 제안한 방식이 기존의 비밀 키 암호 기반 방식에 비해 보안성과 확장성이 뛰어나고, 전력 요구량은 더 적으며, 기존의 공용 키 암호 기반 방법들에 비해 에너지 효율이 더 높은 장점을 갖는 것을 시뮬레이션 결과로 보여준다. USN heterogeneous wireless sensors embedded in the environment with appropriate security and scalability with user authentication method is proposed intrusion prevention. In this study, the proposed user authentication and secret key cryptography, public key cryptography is used for both, to take advantage of the strengths of the two methods is authentication. In this paper, the proposed scheme the secret key of the existing security than password-based system performance, highly scalable, power demand is less, and the public-key cryptography based on the existing methods, a higher energy efficiency compared to the benefits that the simulation results with shown as.
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『선문정로(禪門正路)』에 나타난 여래선(如來禪)의 특성
김원영 ( Kim Won-young ) 성철사상연구원 1999 백련불교논집 Vol.9 No.-
In the Seonmun-jeongno(禪門正路), theory of Sudden Enlightenment and Sudden Cultivation(頓悟頓修) is recommended as a proper way to attain enlightenment, of which the Yeorae-Seon(Zen transmitted by Tathāgatha, 如來禪) is stressed to be practiced. Though the meditation by Koan(公案) originally suggested by Tai-hui(大慧) in Song dynasty, the characteristic of Yeorae-Seon that especially is described in the Seonmun-jeongno also has to be examined since it has been transmitted longtime ago. Here, we also examine the view on the Yeorae-Seon by Song-chol(性徹), Won-hyo(元曉), and Shen-hui(神會) together. Specially the standpoint of Won-hyo look to compromise the one of Song-chol. In his Commentary on Vajrasamadhi Sutra, Won-hyo alluded that the Yeorae-Seon means the entering into the Tathāgatha-garbha, which is accomplished by the Threefold Vision of Unattachedness, or Mahayanic View of Emptiness. Through the learning of the next two steps, that is, the Listening of wisdom or the First Unattachedness and the Thinking on Wisdom or the Second Unattachedness, the Third Unattachedness or Cultivation of Wisdom would be allowed. Cultivation of Wisdom is to be arise from the proper state of meditation, so it should be refered to the Giving Up the Illusive Thinking. From the standpoint of the theory of Ten Bhumis, this can be applied to the First Bhumi. For Won-hyo, Yeorae-Seon denotes the Samadhi that is accomplished at the stage of Boddhisattva’s First Bhumi. Because this state is the same with the tranquility and turmoil of everyday routine, from the point of Three Stage, this is the sameness of move-and-stillness. For Kui-feng(圭峯), Yeorae-Seon is to practice meditation after understanding on the fact that the nature of Tathāgatha-garbha is originally empty and tranquil. This is what is called theory of Sudden Enlightenment and Gradual Cultivation(頓悟漸修). In this context, the knowledge is more important. Ji-nul(知訥) said that the enlightenment can be attainable in the First Step of Ten Stage, thus it means to say that he enters the Yeorae-Seon. Once this stage was called as the Insight into the Nature, the ortho-praxis of Zen Buddhism but, this view is strongly criticized in the Seonmun-jeongno. By the way, Yeorae-Seon(Zen Buddhism of Tathāgatha) and Josa-Seon(Zen Buddhism of Patriarch) have often been involved in the argument about whether the both of them are same or not, which was originally derived from the discussion by Yang-shan(仰山) and Xiang-yan(香嚴). For this discussion Song-chol insists that the dialogue looks superficially to tell the differences between Yeorae-Seon and Josa-Seon, but reflects the equality of them. Song-chol also said that this is the very essence of the Zen. It is can be said that Yeorae-Seon described in the Seonmun-jeongno would be available from the very beginning of Koan practice to the ultimate state of Mindlessness. Thus, there are different views on the Yeorae-Seon. First, Ji-nul told that it is accomplished at the First Stage, for Won-hyo it is at the First Bhumi of Boddhisattva, and for Song-chol it is at the Ultimate Enlightenment. However, when it comes to the Utilization of Mindfulness and Concentration together, Song-chol would get it to correspond to Koan Practice.
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김원영,이영석,이재완,서창호,Kim, Won-Young,Lee, Young-Seok,Lee, Jae-Wan,Seo, Chang-Ho 한국정보통신학회 2008 한국정보통신학회논문지 Vol.12 No.3
유비쿼터스 환경에서의 컴퓨팅 기기들은 초경량 컴퓨팅 환경으로서 사용자들이 컴퓨터의 존재를 인지할 수 없도록 사용자 신체나 주변 환경에 내장되며, 크기가 작고, 적은 기능을 가진 많은 컴퓨터를 여러 곳에 분포하여 네트워크로 통신한다. 초경량 컴퓨팅 환경에서는 사용자들에게 서비스를 제공하기 위해 사용자의 정보를 교환하는 일이 많으며, 사용자의 정보를 보호하기 위해서는 보안 기술이 반드시 포함되어야 한다. 본 논문에서는 초경량 컴퓨팅 환경에서 표준화 된 보안 서비스를 제공하는 초경량 환경을 위한 보안 서비스 지원을 위한 API를 연구하고 설계한다. 초경량 환경의 보안 서비스 지원을 위한 API는 일반적인 컴퓨팅 환경에서와 같이 데이터 암호화, 데이터 인증, 키 관리 등의 보안 서비스를 제공하며, 초경 량 컴퓨팅 환경에 맞는 RC5와 SHA1 알고리즘 사용, 효율적인 메모리 관리를 위해 각 서비스를 라이브러리화하여 필요시마다 라이브러리를 할당/해제하는 등의 초경량 컴퓨팅 환경의 문제점을 해결할 수 있도록 설계, 구현한다. Computers used fer light-weight computing environments are considerably limited in resources and performance running in ubiquitous environment. Because of the limited resources, it is difficult to apply existing security technologies to the light-weight computers. In this paper, light-weight security software is implemented using RC-5 encryption and SHA-1 authentication algorithm which is appropriate for light-weight computing environments. The design of components based on security software of a light-weight computer application and the test-bed for security software are presented. The simulation verifies the correctness of the security software. The architecture of the light-weight and reconfigurable security software for light-weight computer applications is proposed. The proposed security software is small size and provides reconfigurable security library based on the light-weight component and the software manager that configures software platform is loaded with the library at the time it is needed.
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석고 모형재와 고무인상재의 젖음성이 지르코니아 코핑의 변연적합도에 미치는 영향
김원영,정인성,전병욱,Kim, Won-Young,Chung, In-Sung,Jeon, Byung-Wook 대한치과기공학회 2016 대한치과기공학회지 Vol.38 No.4
Purpose: This study examined the effect of wettability of gypsum materials and rubber impression material on the marginal fitness of zirconia copings. Methods: Three commercially available gypsum materials(Fugirock EP, Snow Rock, Tuff Rock) and three zirconia blocks(iJAM Emerald, LUXEN Smile block, ICE Zirkon transluzent) were studied. The zirconia copings were fabricated by using dental CAD/CAM system. Contact angles on the impression materials were measured with contact angle measuring device. Silicone replica method was used to measure the marginal fitness and cutting was performed on the bucco-lingual and mesio-distal sides. It were observed with a stereomicroscope at °ø40 magnification. The data were statistically analyzed with One-way ANOVA. Results: Mean values of contact angles were $58.3{\pm}0.7^{\circ}$ for Tuff Rock, $77.5{\pm}0.5^{\circ}$ for Fugirock EP and $87.8{\pm}0.5^{\circ}$ for Snow Rock and the difference between them was statistically significant(p<0.05). The smallest values of marginal fitness for the JF groups were $30.7{\pm}3.0{\mu}m$ for bucco-lingual direction, $29.3{\pm}3.0{\mu}m$ for mesio-distal direction. One-way ANOVA showed statistically significant difference between groups for marginal fitness(p<0.05). Conclusion: Tuff rock gypsum material had superior wettability to others. The mean marginal fitness of the Tuff rock gypsum material group were significantly better than other groups. Thus they can be also expected to show clinically satisfactory marginal fitness.
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우리나라 자연사면 산사태지역의 강우, 지질 및 산사태 기하형상 고찰
김원영 ( Won Young Kim ),채병곤 ( Byung Gon Chae ) 대한지질공학회 2009 지질공학 Vol.19 No.3
1990년 이후 우리나라의 자연사면에서 발생한 10개 대규모 산사태지역의 강우조건, 지질특성 및 기하형상에 대한 기존자료를 재조명하였다. 이들 중 화강암 지역이 5곳, 화강암과 변성암류가 같이 분포하는 지역이 4곳이며, 나머지 1곳은 반려암이 분포한다. 총 3,435개의 산사태 중 1,992개는 화강암 분포지에서, 824개는 변성암 지역에서, 15개는 반려암에서, 그리고 나머지 604개의 산사태는 2개 지역에 부분적으로 분포하는 화산암, 퇴적암 등에서 발생하였다. 연구지역의 산사태는 강우기간 보다는 강우강도에 의하여 좌우되었다. 산사태지역의 강우자료를 Caine과 Olivier의 경험식에 적용하면 모두 Caine의 기준치(threshold)와 Olivier의 산사태반응지수(coefficient of final response)를 초과하여, 모든 지역의 강우조건이 산사태 발생조건을 충족하고 있다. 산사태의 형태와 발생 메카니즘은 기반암의 풍화특성에 따라 차이를 보이고 있다. 화강암 지역은 노두가 거의 없고 풍화심도가 고르게 분포하여 소규모의 슬라이드가 우세하다. 반면 변성암 지역은 지형이 다소 험준하고 노두가 능선과 산록에 발달하여 풍화노두가 토층과 함께 파괴, 유동하는 비교적 큰 규모의 토석류가 우세하다. Large landslides occurred since 1990 on natural terrain, Korea were reviewed with the existing data to characterize them in terms of the condition of rainfall, geology and geometry. Ten landslide areas over the nationwide are selected for this study. Among them, five areas consist of granite basement, four areas of granite and metamorphic rocks and the remaining an area of gabbro. The basement lithology on which landslides most dominantly occurred is granite, on which 58% of landslides among the total 3,435 are taken place, the next dominant one is metamorphic rocks where 24% of landslides are occurred, and the remaining 18% are on the areas of volcanic and sedimentary rocks which are partly distributed in some areas. The landslide occurrences may depend on the rainfall intensities rather than durations. We applied the theories of Caine`s threshold and Olivier`s final response coefficient to the Korean cases. The rainfall conditions at the landslide areas were all satisfied enough with the landslide triggering conditions suggested by Caine and Olivier. The triggering mechanism and type of landslides may largely depend on the weathering and geomorphic characteristics of basement lithology. The granite areas are characterized by being relatively shallow but consistent weathering profiles and almost no outcrop, and therefore, shallow translational slides are dominant. Whereas metamorphic areas are characterized by consisting of steep slope, weathered outcrops on ridges and partly on flanks and irregular weathering profiles, and relatively large debris flows are dominant.
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김원영 ( Won-young Kim ),김치수 ( Chi-su Kim ),김진수 ( Jin-soo Kim ) 한국인터넷정보학회 2002 인터넷정보학회논문지 Vol.3 No.3
웹을 통한 원격교육은 시간과 공간의 문제를 극복할 수 있다는 큰 장점에도 불구하고 강의실 및 집합교육에 비해 연수생 관리가 취약하다는 문제점을 지니고 있다. 이러한 문제는 원격교육활동의 성취수준 및 목표도달에 대한 커다란 장애로 부담이 되고 있고 원격교육담당자에게 많은 고민을 안겨주고 있다. 원격교육담당자는 원격교육활동에 대한 연수생의 참여와 반응을 계속적으로 모니터링 해야 하고 이에 대한 적절한 피드백을 연수생에게 제공하여야 함에도 불구하고 기존의 원격교육시스템은 교수학습활동에 중점을 둔 나머지 원격교육활동에 대한 효율적 관리기능을 제공하지 못하고 있다. 따라서 본 논문에서는 원격교육의 일환으로 실시되고 있는 원격교원연수의 효율적 운영이 가능하며 교원연수가 목표로 하는 성취수준의 효과적 달성을 위해 원격교원연수의 적합한 관리요소를 추출하고 이를 시스템 또는 연수 관리자가 연수과정에 적용하여 연수생에 대한 적절한 피드백의 제공이 가능한 원격교원연수 관리시스템을 효율적으로 구현하였으며 교육과정과 컴퓨팅 환경에 따라 시스템의 유연한 변경도 가능하게 되었다. The web-based distance education has some problems in managing students despite the merit of getting over the problem of time and space compared with the classroom education or residential course. These problems make the web-based distance learners difficult in achieving the purpose and the standard of goal. And they drive the manager in charge of the web-based distance education into worries. The manager of the distance education should keep on monitoring students` participation and response, and then give the appropriate feedback to the students. But, the existing distance education system neglects to support efficient management function, for it puts emphasis on the activity of teaching and learning. Therefore, the purposes of this study are to extract the factors that are necessary to manage the distance education for training teachers, to realize the effective management system which can offer a proper feedback in the distance education for training teachers through the application of those factors to the training program, to make it possible to change the management system flexibly according to the curriculum and the computing setting.
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