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LR-WPAN에서 사전인증기법을 이용한 기기 인증 프로토콜
이성형(Sung-Hyung Lee),김재현(Jae-Hyun Kim) 大韓電子工學會 2010 電子工學會論文誌-TC (Telecommunications) Vol.47 No.4
본 논문에서는 LR-WPAN을 위한 새로운 인증 프로토콜을 제안한다. 제안하는 프로토콜에서는 계층 구조를 이용한 인증을 수행하여 인증의 안전성 및 신뢰성을 확보한다. 또한 계층 구조에서 나타나는 효율성 감소 및 denial of service(DoS) 공격에 대한 취약점을 해결하기 위하여 정보 교환 횟수를 줄여 적합한 사용자 및 적합하지 않은 사용자를 인증할 때의 효율성을 제공하고 Local Authentication Key를 이용하여 트러스트 센터(trust center)와 참여자 기기 및 부모 노드와 참여자 기기 사이의 신뢰 관계를 확인한다. 제안하는 프로토콜의 성능 평가를 위하여 security 분석을 통해 안전성을 평가하며 GNY 분석을 통해 프로토콜의 신뢰성을 평가한다. 또한 DoS 공격 발생 시 네트워크에 참여중인 기기의 메시지 전송 횟수를 분석하여 DoS 공격에 대한 프로토콜의 안전성을 평가한다. 마지막으로 현재 LR-WPAN을 위한 표준인 ZigBee의 인증 프로토콜과 제안한 프로토콜을 LR-WPAN 기기에 구현하여 인증과정에 필요한 시간을 측정하고, 측정된 시간을 바탕으로 각 홉 수 별로 인증 완료 시간을 분석한다. 이 과정을 통하여 제안한 프로토콜이 기존의 인증 프로토콜보다 보안성이 강화되며 인증 완료시간을 홉 수에 따라 최대 30% 줄임을 확인하였다. This paper proposes a new authentication protocol for the LR-WPAN. In order to guarantee the reliability and safety of a protocol, this protocol uses the hierarchical authentication approach. In addition, in order to reduce the impact of the denial of service attack, the proposed protocol performs the authentication between a parent router and a joiner device prior to the authentication between a trust center and the joiner device. Moreover, this protocol reduces the authentication delay by decreasing the number of message exchanges during authentication procedure. This paper evaluates the safety of the proposed protocol by the security analysis and reliability of the proposed protocol by the GNY analysis. This paper also compares the number of message exchanges of the ZigBee authentication protocol and the proposed protocol when denial of service attack occurs to evaluate the resistance of the proposed protocol against the denial of service attack. We also analyze the delay for authentication of the joiner device through the implementation of both protocols. Those results show that the proposed protocol effectively protects networks from the denial of service attack and reduces the time for authenticating the joiner device up to maximum 30% as the number of hops increases.
연행록(燕行錄)의 백이(伯夷),숙제(叔齊) 관련 한시(漢詩) 연구 -임란(壬亂) 수습기(收拾期)를 중심으로-
이성형 ( Sung Hyung Lee ) 근역한문학회 2010 한문학논집(漢文學論集) Vol.31 No.-
This study considered characteristics of chinese poets associated with Baek-Y & Suk-Jae (伯夷·叔齊) who were mostly referred as a subject matter in the Yeonhaeng-Rok(燕行錄), classifying them by a system, form, subject and contents. First, as for a system and a form, the subject showed characteristic of memorizing and intending Baek-Y and Suk-Jae(伯夷·叔齊) using the term ``Al(謁)``. Also the trend of increasing rate of the importance and adding reference list and notes shows the writer` intending discussion. This may influenced on the appearance of a prose of the Yeonhaengrok(燕行錄) and the Yeonhaeng-Gasa(燕行歌辭, lyrics of the Yeonhaengrok) in the late of Chosun(朝鮮). Poets looked to have a property of memorizing the past. This is because the characteristic of a travel essay which the Yeonhaeng(燕行) has in its meaning and a discussion-value of historical persons were shedded a light at that time. As for characteristic of the subject and contents, the poets which intensified and expanded the spatial perception of Baek-Y and Suk-Jae(伯夷·叔齊) were disclosed to expand the spatial perception of the time of Baek-Y and Suk-Jae(伯夷·叔齊) as a holy place. In particular, it showed a potential that the scope of the perception on the holy place would extend to the whole Chosun(朝鮮) country through the novel written by Jung Mun-Bu(鄭文孚). Next, the writer looked to intensify his positive understanding of Baek-Y and Suk-Jae(伯夷·叔齊), on which the consciousness of Jaejojieun(再造之恩, A grace received when somebody is in serious difficulty) might affect as an important factor. means, the loyalty that Baek-Y and Suk-Jae(伯夷·叔齊) had was in the same horizon of the perception of the Jaejojieun(再造之恩) that intellectuals of the Chosun(朝鮮) after Japanese invasion of Korea in 1592 kept and intended as a final target. In addition, the perception of the Jaejojieun(再造之恩) decisively intensified the respect and admiration for the Chinese Myung(明) dynasty that the perception and the assesment on Baek-Y and Suk-Jae(伯夷·叔齊) could be further intensified. The aspect of intensifying positive perception and values on Baek-Y and Suk-Jae (伯夷·叔齊) was disclosed by shedding lights on their lives and glorifying their loyalty and ethics. Second, the writer put a high value on their reasonable and peaceful suggestion to solve the problem without self interest comparing with other heros and scholars. Third, the writer showed his firm perception on the loyal action and its justification through argues against Samacheon(司馬遷) and Jangja(莊子) for their assesment on Baek-Yi and Suk-Jae(伯夷·叔齊). A significance which the poets has in the literature history is that it shows a characteristic of memorizing and glorifying the past in its form wise, and a perception on the loyalty and ethics was positively intensified in its contents wise.
이성형 ( Sung Hyung Lee ),송인주 ( Song In Ju ) 역사교육학회 2012 역사교육논집 Vol.48 No.-
The purpose of this paper is suggest teaching methods for historical data lesson in elementary history classrooms. Historical data as a source of historical knowledge have interpretive and controversial characteri-stics in themselves. It is, therefore, important that students exchange their ideas each other over the data and seek for implications in them, since this is part of being democratic citizens. Before teachers practise this kind of instruction step by step, students should have some understanding a priory what historical data are. This paper suggests some instructional contexts for teachers which may help children understand what historical data are and what characteristics they have. Children are expected to develop historical sense of data more effectively by trying historical generalization and historical imagination.