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비밀키를 NAF로 사용하는 암호시스템의 차분 전력분석 공격
안만기 ( Mahn-ki Ahn ),하재철 ( Jae-cheol Ha ),이훈재 ( Hoon-jae Lee ),문상재 ( Sang-jae Moon ) 한국인터넷정보학회 2003 인터넷정보학회논문지 Vol.4 No.3
전력 분석 공격은 스마트 카드를 사용하는 암호 시스템에 대한 물리적 공격이다. 본 논문에서는 타원곡선 암호 알고리듬을 사용하는 스마트 카드가 비밀키를 NAF(non-adjacent form)로 부호화하여 사용하여도 차분 전력분석 공격에 대응할 수 없음을 실험을 통하여 제시하였다. 공격 대상인 비밀키를 모르는 스마트 카드에서 암호 알고리듬 동작 시점부터 측정된 평균 전력 신호와 비밀키 변경이 가능한 스마트 카드에서 측정된 평균 전력 신호를 차분함으로써 비밀키를 한 비트씩 순차적으로 알아낼 수 있다. The power analysis attack is a physical attack which can be applied to the cryptosystems such as smartcard. We try to experimental attack to a smart card which implemented Elliptic Curve Cryptosystem adopting NAF algorithm as a secret key recording method. Our differential power analysis attack is a potential threat to that implementation. The attacker measures the power traces during the multiplication with secret key bits in a target smart card and the multiplication with the guessed bits in other experimental one. The comparison of these two traces gives a secret bit, which means that attacker can find all secret key bits successively.
안만기,전재현,안길환,이승영,Ahn, Mahn-Ki,Jeon, Jae-Hyun,Ahn, Gil-hwan,Lee, Seung-Young 한국군사과학기술학회 2017 한국군사과학기술학회지 Vol.20 No.4
In this paper, authors described on localization development's results about an electric igniter in thermal battery with a pyrotechnic heat sources. Especially, the development test and evaluation(DT&E) process and the methods in the developments of the electric igniter which is parts of a domestic thermal battery on K-PSAM was in charge of government and developed for defense of a local areas in Korea. We have proposed a process of design and manufacture on the electric igniter. Finally, we verified a quality and a reliability of the electric igniter from test results by Fisher-Snedecor's law and over 99.5 %(C.L. 95 %) for K-PSAM.
D형 리튬 1차 단위전지(Li/SOCl<sub>2</sub>)용 저가형 과방전 차단회로 개발
안만기,정영탁,임재성,노태주,Ahn, Mahn-Ki,Jung, Yeong-Tak,Lim, Jae-Sung,Roh, Tae-Joo 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.5
In this paper, we propose a development results of a D-type non-rechargeable lithium battery($Li/SOCl_2$) on improvement in a low cost protection circuit of discharge for domestic military power source. According to this study, we describe a new design and product with 8-bit microcontroller in the protection circuit which can estimate state of health of the battery regardless of occurring an initial voltage delay. Also this paper discuss and facilitate development as solution to a safety about the non-rechargeable lithium batteries. As a result, we verified a quality of the protection circuit by a development test and evaluation(DT&E) process.
안만기,권택만,황운희,황우열,Ahn, Mahn-Ki,Kwon, Tag-Mahn,Hwang, Un-Hee,Hwang, Woo-Yull 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.6
This paper describes on methods in test and evaluation of the guided rocket munitions of the domestic new generation multiple launcher rocket system. We modified and refer to the present model of air-to-air missile(AAM) and surface-to-air missile(SAM). Also we suggested a method of surface-to-surface missile(SSM) based on the characteristics of the guided rocket in test and evaluation(T&E). According to this study, the suggested activity of T&E should be observed methods compatible with each item on the established model. Therefore, we expect that the proposed research material will be a good guide to the study of a surface-to-surface missile(SSM) installed GPS/INS integration navigation guidance & control systems in the future.