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형식 규격어을 이용한 보안표준의 기술과 Strict Conformance Testing에 관한 연구
김기수,김영화,류재철 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1
This paper represents the importance of using Formal Specification Language(FSL) in the security relevant standards and introduces the VDM-SL toolbox which is one of FSL tools. Also, Strict Conformance Testing(SCT) methodology is introduced to test the implementations of security standards. Finally, we show the necessity of FSL in testing of security standards.
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.
박철용(Cheol-Yong Park),김기홍(Ki-Hong Kim),류재철(Jae-Cheol Ryou) 한국정보보호학회 2014 정보보호학회논문지 Vol.24 No.4
전술통신망은 이기종 다양한 특성의 통신장비로 구성된 네트워크가 복합적으로 운용되고 있다. 이러한 구성으로 인해 종단간 통신을 위해 기종별 데이터 포맷으로 변환하기 위한 망연동 게이트웨이를 적용하고 통신 정보보호를 위해 네트워크별 암호기술이 적용되고 있다. 이는 이기종 망간 암호화된 데이터를 직접 전송할 수 없고 통신데이터의 재가공 및 처리지연의 문제점이 있다. 서로 다른 전술통신망 사이에 위치하는 망연동 게이트웨이에서 통신데이터에 대한 재가공과 암호화 데이터에 대한 복호화 및 재암호화가 요구된다. 본 논문에서는 전술통신망에서 이기종간 종단간 암호화 통신을 위한 통신방식을 제안한다. 제안한 방식을 이용하여 PSTN과 UHF 통신망간 게이트웨이에서 재가공, 재암호화, 전송 지연요소 등을 없애 실시간 음성 및 데이터 통신을 가능하게 한다. 또한, 종단간 정보보호를 위해 단대단 정보보호방식을 적용한다. 이를 통신망에 적용하여 기존 방식 대비 제안한 방식의 성능을 비교 분석한다. 제안한 방식은 기존방식의 문제점을 해결하고 이기종 전술통신망간 종단간 암호화 통신이 가능함을 확인하였다. Tactical networks is being operated in configuration that consisting of a variety of characteristics communication equipments and heterogeneous networks. In this configurations, end-to-end communication can be achieved using interworking gateway for converting the data format of the network and using encryption algorithm of the networks. The use of mechanism results in a problem that secure data cannot be transferred directly, reprocessing and processing delay of communication in heterogeneous tactical networks. That is, for encoding and decoding of data, the decryption of encrypted data and re-encryption processing must be required at the gateway between different networks. In this paper proposes to mechanism for end-to-end secure communication in heterogeneous tactical networks. Using the proposed method, end-to-end secure communication between heterogeneous tactical networks(PSTN-UHF networks) which removes the necessity of a gateway for converting data into data formats suitable for network to remove a transmission delay factor and enable real-time voice and data communication and achieve end-to-end security for heterogeneous tactical networks. we propose a novel mechanism for end-to-end secure communication over PSTN and UHF networks and evaluate against the performance of conventional mechanism. Our proposal is confirmed removal of security vulnerabilities, end-to-end secure communication in heterogeneous tactical networks.
IPv4 Address Trading Using Resource Certificate
Park, Cheol-Soon,Ryou, Jae-Cheol,Park, Yong-Tae Korea Information Processing Society 2010 Journal of information processing systems Vol.6 No.1
The Internet has been growing at unprecedented rates. The problem of an address shortage could act as a barrier on this growth. In principle, a new Internet standard, IPv6 solves the problem of the address shortage because it has a very large address space. But IPv6 is not yet compatible with the IPv4 and during the IPv4-to-IPv6 transition period IPv4 address will continue to be in demand. Thus for quite some time, the problem of IP address shortage will persist. To solve the problem, we propose the mechanism of secure IP address trading. This mechanism is based on the Resource PKI (RPKI). The RPKI is the working item of IETF. This proposed mechanism maximizes the trust of IP address trading using RPKI.