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고속 영상데이터 암호화에 적합한 SES Alarmed 링크 암호동기 방식
김형락,이훈재,권대훈,박의영,Kim, HyeongRag,Lee, HoonJae,Kwon, DaeHoon,Pak, UiYoung 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.12
CCSDS 규격은 국제 우주 통신 분야에서 하나의 규격으로 폭넓게 사용되고 있다. 이 규격에서 암호화는 계층별로 고유의 암호 프로토콜을 수행해 통신 채널에서 보안 요구사항을 만족하도록 하고 있고, 동기화를 위해서는 암호화된 데이터의 시작부에 암호화 동기를 삽입하여 수행한다. 그러나 예외적인 상황(타이밍 지터링, 시스템의 비정상적인 종료 등)의 발생 시 수신 장비는 데이터를 수신하더라도 정상적인 데이터를 복원할 수 없게 되는 문제점을 가지고 있다. 본 논문에서는 송수신 도중에 문제가 발생할 경우 송신측에 SES Alarm 신호를 전송하여 정상적인 송수신이 이루어지도록 하는 SES Alarmed 링크 암호동기 방식을 제안하고, 성능 분석을 통하여 SES Alarm 신호를 위한 최적의 조건을 제시하였다. CCSDS Standard is widely used in international space telecommunication area. In this standard, Encryption is realized using a unique hierarchical encryption protocol and satisfied security requirements of communication channels. For synchronization, encryption sync is attached in the beginning of encrypted data. But exceptional case(timing jittering, abnormal system shutdown, etc.) is occurred, receiving equipment cannot decrypt received data. In this paper, we propose a SES Alarmed link encryption synchronization method for sending warning signal to the transmitter when some problems have been occurred during the transmission and we also suggest optimum conditions for SES Alarm signal through performance analysis.
서연호,송주한,권대훈,이상재,Seo, Yeonho,Song, Juhan,Kwon, Daehoon,Lee, Sangjae 대한예방한의학회 2018 대한예방한의학회지 Vol.22 No.1
Objectives : The aim of this study is to analyze the patent trend in Traditional Korean Tea. In this paper, we investigate the diversity of Korean Tea registered as patents focusing on the kinds of medicinal herbs used, processing methods, and types of tea. Methods : We collected patents data using KIPRIS, and WIPS database. We conducted Quantitative Analysis by year and main patentee, and Qualitative Analysis by patent's contents. Results : 313 patents are selected from 2001 to May 2017. The number of patents have been on the rise and reached 44 in 2014. Individuals have registered the most patents, followed by companies, Industry-University Cooperation Foundation, and local autonomous entities. Ginger, Omija and Cactus were used at high frequency among 109 tea containing one medicinal herb. Licorice and Jujube were frequently used among 204 tea containing more than two kinds of medicinal herbs. In classification of patent by efficacy, 'health promotion and function recovery' and 'treatment and prevention of diseases' are most frequently specified. 128 patents are presenting processing methods for medicinal herbs in the order of roasting, fermentation, and fumigation. Among 164 patents presenting tea types, liquid type accounts for more than half and there are 67 leached tea, and 32 powder tea. Conclusion : The analyses results showed that lots of new recipes, efficacy, processing methods and tea types are being studied and registered as patents. In order to help Traditional Korean Tea industry to develop, active patent registration and further study about up-to-date patent trend would be required.
하태진,김선용,박선영,권대훈,함재현,임혁,Ha, Taejin,Kim, Sunyong,Park, Sun Young,Kwon, Daehoon,Ham, Jaehyun,Lim, Hyuk 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.4
When GPS signals are not available, a relative localization can be alternatively used to represent the topological relationship between mobile nodes. A relative location map of a network can be constructed by using the distance information between all the pairs of nodes in the network. If a network is large, a number of small local maps are individually constructed and are merged to obtain the whole map. However, this approach may result in a high computation and communication overhead. In this paper, we propose a reference-node selection scheme for relative localization map construction, which chooses a subset of nodes as a reference node that is supposed to construct local maps. The scheme is a greedy algorithm that iteratively chooses nodes with high degree as a reference node until the chosen local maps are successfully merged with a sufficient number of common nodes between nearby local maps. The simulation results indicate that the proposed scheme achieves higher localization accuracy with a reduced computational overhead.
전술메쉬 트래픽 QoS 조율을 위한 네트워킹 노드의 개념 설계 및 실시간 모니터링
신준식(Jun-Sik Shin),강문중(Moonjoong Kang),박주만(Juman Park),권대훈(Daehoon Kwon),김종원(JongWon Kim) 한국스마트미디어학회 2019 스마트미디어저널 Vol.8 No.2
정보통신 기술의 발전으로 응용 서비스들을 IP(Internet protocol) 기반으로 통합하는 All-IP 기반 미래형 전술망으로의 전환이 지속적으로 진행되고 있다. 이러한 변화에 대응하기 위해 전술 WAN 노드들이 메쉬구조로 연결된 미래형 전술메쉬망에서 응용 서비스의 QoS(quality of service) 보장을 위해, 인프라 계층과 응용 서비스 계층 사이에 존재하는 전술 서비스 메쉬 (tactical service mesh) 계층을 도입하는 것을 시도하는 제안이 있다. 하지만 기존 전술망을 구성하는 폐쇄형 네트워킹 박스들과 정적인 QoS 관제도구들은 전술 서비스 메쉬 계층에서 요구하는 지능형 QoS 조율을 위한 동적 QoS 관제를 지원하는 것이 어려운 상황이다. 따라서 본 논문에서는 SDN/NFV 기반 DANOS 화이트박스 서버스위치를 기반으로 다중-액세스 네트워킹 인터페이스와 가상화된 네트워킹 스위치를 포함하도록 하드웨어/소프트웨어 통합 설계한 전술메쉬 WAN 노드를 구성하는 방안을 제안하고 이를 개념화 수준에서 설계하여 제시한다. 또한 설계한 전술메쉬 WAN 노드에 eBPF 기반의 트래픽 모니터링 방식을 연계하는 방안을 제안하고, 이를 통해 전술 트래픽의 QoS 조율을 지원하는 트래픽 모니터링이 가능함을 검증한다. With the advancement of information and communication technology, tactical networks are continuously being converted to All-IP future tactical networks that integrate all application services based on Internet protocol. Futuristic tactical mesh network is built with tactical WAN (wide area network) nodes that are inter-connected by a mesh structure. In order to guarantee QoS (quality of service) of application services, tactical service mesh (TSM) is suggested as an intermediate layer between infrastructure and application layers for futuristic tactical mesh network. The tactical service mesh requires dynamic QoS monitoring and control for intelligent QoS coordination. However, legacy networking nodes used for existing tactical networks are difficult to support these functionality due to inflexible monitoring support. Thus, in this paper, we propose a tactical mesh WAN node as a hardware/software co-designed networking node. The tactical mesh WAN node is conceptually designed to have multi-access networking interfaces and virtualized networking switches by leveraging the DANOS whitebox server/switch. In addition, we explain how to apply eBPF-based traffic monitoring to the tactical mesh WAN node and verify the traffic monitoring feasibility for supporting QoS coordination of tactical-mesh traffic.