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      • KCI등재

        Design of Secure Information Center Using a Conventional Cryptography

        최준혁,김태갑,고병도,류재철,Choi, Jun-Hyuk,Kim Tae-Gap,Go, Byung-Do,Ryou, Jae-Cheol 한국정보보호학회 1996 정보보호학회논문지 Vol.6 No.4

        World Wide Web is a total solution for multi-media data transmission on Internet. Because of its characteristics like ease of use, support for multi-media data and smart graphic user interface, WWW has extended to cover all kinds of applications. The Secure Information Center(SIC) is a data transmission system using conventional cryptography between client and server on WWW. It's main function is to support the encryption of sending data. For encryption of data IDEA(International Data Encryption Algorithm) is used and for authentication mechanism MD5 hash function is used. Since Secure Information Center is used by many users, conventional cryptosystem is efficient in managing their secure interactions. However, there are some restrictions on sharing of same key and data transmission between client and server, for example the risk of key exposure and the difficulty of key sharing mechanisms. To solve these problems, the Secure Information Center provides encryption mechanisms and key management policies.

      • KCI등재
      • KCI등재

        택지개발지구내 주차장의 문제점과 개선방안에 관한 연구

        황진성(Jin-Sung Hwang),김태갑(Tae-Gap Kim) 한국산업융합학회 2013 한국산업융합학회 논문집 Vol.16 No.2

        The purpose of this study is recognized the problems of parking and parking demand, supply and operation of the control etc. It is to provide an alternative for the overall parking problem. Parking problem occurs because there is not enough parking spaces. In order to solve the parking problem of Chil-gok 1 residential development district, this study propose making use of a road parking lot establishment and the school playground and the public facilities construction parking lot. But it is the methods which are short-term. A fundamental solution method is Levying garage option on car buyers. It is system to apply a law for establishing garages to all of vehicles.

      • NDAS 용량 결정을 위한 시뮬레이션

        김태갑,김미성,류재철 충남대학교 1996 忠南科學硏究誌 Vol.23 No.1

        NDAS(Network Data Access System) is a system that interconnects high speed network(B-ISDN) and local area network(Ethernet, FDDI). Nowadays, the request of multimedia data increase rapidly, so NDAS system must accepts and processes that request efficiently. Comparing with normal data traffic character, multimedia data traffic character is much complex, so it is necessary to make the system that can cover such factor. In this paper, we suggest a NDAS hardware system model and also we propose a proper buffer size of NDAS system through the simulation. To suggest proper buffer size of NDAS, we assumed two different simulation models, one is the case of using only one buffer and the other is the case of using two different buffers for Ethernet and FDDI, respectively. After comparing and analyzing of simulation result, we suggests the proper NDAS system buffer size.

      • 정온법을 이용한 절연재료의 열확산 계수측정

        裵信徹,金泰甲 단국대학교 1989 論文集 Vol.23 No.-

        Serveral transient techniques were used for measuring the thermal diffusivities of fibrous insulating meterials. The transient technique use din the present study was the constant temperature plate method. The mathematical model of the CTP method is based on a semi-infinite slab with finite thickness, with the front of the slab modeled at constant temperature and the rear face as being maintained at the initial temperature. At time zero, the sample was placed for several minutes on a hot plate maintained at constant temperature. The temperatures of both sample on a hot plate maintained at constant temperature. The temperature of both sample faces were measured as a function of time to confirm the boundary conditions. Temperature of an interior position of the sample were measured and were used to calculate the termal diffusivity. The boundary conditions were satisfied during the time from zero to the time just before the rear face temperature started to rise. The thermal diffusivities of NBS, blanket, made in U.S.A. and several insulators made in Korea were measured about 300℃ to confirm the accuracy of the experimental apparatus.

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