• Review of KIISC
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• v.30 no.6
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• pp.57-66
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• 2020

세계적으로 저명한 학회인 Cryptogrpahic Hardware and Embedded Systems(CHES)에서는 매년 부채널 공격, 암호 S/W, H/W 구현을 포함하는 정보 보안 분야에서의 화제가 되는 분야를 연구하고 공유한다. CHES 2020의 경우 부채널 공격, 양자 내성 암호, 머신 러닝과 같이 최근에 제시되어 활발하게 연구가 진행되고 있는 주제뿐만 아니라 역공학, 하드웨어 구현, 타원 곡선 암호, 화이트 박스 등의 다양한 결과들이 발표되었다. 본 논문에서는 CHES 2020을 통해 암호화 소프트웨어/하드웨어 및 임베디드 시스템에서의 보안 기술 개발 및 연구 동향을 살펴보며, 이에 따른 향후 연구 전망을 제시한다.

• 한국체육학회지인문사회과학편
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• v.51 no.4
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• pp.419-425
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• 2012

The purpose of the study was to investigate the effects of knee brace on anterior cruciate ligament injuries risk factors during one-legged landing of female gymnasts. Eleven female gymnasts were recruited and performed randomly one-legged drop landing in height of her's knee with (3times) and without (3times) knee brace. Kinematics and ground reaction data were collected to estimate the anterior cruciate ligament injuries risk factors. Data were analyzed with paired samples t-test. Female gymnasts with knee brace showed more reduced the distance from ankle joint center to knee joint center in sagittal plane and knee maximum joint torque than without knee brace. In conclusion, Female gymnasts with knee brace reduced anterior cruciate ligament stress.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.6
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• pp.1429-1434
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• 2014

Recently, SUA(Sudden Unintended Acceleration) are increasingly occurred. However, all the responsibilities of SUA are accepted by an innocent driver despite of painful results due to mystery of accurate cause. If a driver raises this kind of trouble to the corresponding manufacturer, the automaker collects EDR installed in that vehicle and provides the result of their analysis as it turns out most of the analysis results were diagnosed "there is nothing wrong with the car". In this trend, the technology to protect drivers' position from SUA should be developed. In this study, the researchers aimed to develop a black box system that collects additional data from throttle valve which is considered as one of major causes of SUA accidents, in order to explain cause of SUA and defend innocent drivers.

• Journal of Digital Convergence
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• v.20 no.5
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• pp.211-220
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• 2022

This paper proposes a green closed-loop supply chain network (GCSN) for optimizing closed-loop supply chains. The GCSN focuses on the application of the recycling express box in logistics circulation, accelerates the standardization of logistics operations and the use of express packaging in e-commerce companies, and promotes the reduction and greening of recycling express box in the e-commerce industry. The GCSN is represented as a mathematical formulation and implemented using LINGO. Greening, environmental protection, and wisdom are the general trends for promoting the growth of the e-commerce industry. Meanwhile, the price of raw materials has increased owing to a shortage of resources, which emphasizes the need for e-commerce enterprises to develop green packaging. Therefore, this study considers the shared circular packaging launched by e-commerce enterprises as the research object, and integrates the problem of facility positioning and path planning in the logistics system. The conclusion summarizes the significance of this study.

• The KIPS Transactions:PartB
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• v.16B no.2
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• pp.101-108
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• 2009

As content serviced for IP set-top boxes is streamed over IP network, the existing hacking tools for IP network can be used to capture the streamed content. Until recently, most of the content serviced on IP set-top boxes has been MPEG-2 TS. However, this content will be gradually moved to WMV, MPEG-4 or H.264 because of the relatively low compression efficiency and overhead of the TS packet. In this paper, we propose a DRM scheme other than WMRM for streamed WMV content. Our approach is to design a DRM scheme independent to the existing WMV streaming system. We also design this scheme in order to provide the feature for controlling the DRM processing time considering device performance. We verified it through the experiment.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.5
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• pp.47-58
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• 2011

Recently, there are several technologies for protecting information in the lightweight device, One of them, the AES[1] algorithm and CRT mode, is used for numerous services(e,g, OMA DRM, VoIP, IPTV) as encryption technique for preserving confidentiality. Although it is possible that the AES algorithm CRT mode can parallel process transmitting data, IPTV Set-top Box or Mobile Device that uses these streaming service has limited computation-ability. So optimizing crypto algorithm and enhancing its efficiency for those environment have become an important issue. In this paper, we propose implementation method that can improve efficiency of the AES-CRT Mode by improving algorithm logics. Moreover, we prove the performance of our proposal on the mobile device which has limited capability.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.4
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• pp.2391-2400
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• 2015

Weather proof steels are used for steel bridges due to its high corrosion resistance under atmospheric conditions. However, instead of forming stabilized rust layers, general rust occurs on weather proof steels under high humidity condition close to seawater or shady places. In Japan, therefore, they perform rust stabilization treatment instead of unpainted treatment due to severe atmospheric conditions. However, most of domestic weather proof steels were constructed unpainted in the form of closed box-girder, which makes the periodical repetition of dry and wet hard to occur. For the steel bridges constructed on the Han river, the evaporation of water, dew condensation due to temperature change, and stagnant water due to rain affect harmfully on the formation of passive film on weather proof steels. Thus, in this research, in order to analyze corrosion properties inside the closed box-girder for the unpainted weather proof steel bridge in the waterworks safety zone, multiple ways of analysis such as observation with eyes, cellophane-tape test, steel thickness measurement, surface corrosion potential measurement, electron microscope analysis, and X-ray diffraction analysis of the rust were performed. As a result, unstable rust layer was observed inside the closed box-girder, and severe corrosion was observed on the top and bottom of the flanges due to the effects of stagnant water caused by rain, dew condensation, and de-icing materials.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.3
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• pp.701-712
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• 2016

The number of subscriber of digital pay TV service such as Digital Cable TV and IPTV is increasing from various kind of service provider world widely. These services require personal information of users to provide VOD(Video on Demand) and customized contents. Therefore, massive amount of personal information collected by service provider can cause social confusion such as leakage of privacy and property damage. This paper investigates whether broadcasting stations are providing enough notification for privacy policy and methodology of collecting private information in proper way. Furthermore, we analyze actual network traffic of IPTV service between user and service provider to suggest solution of privacy protection along with current status analysis.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.6
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• pp.1463-1474
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• 2018

Fuzzing is one of the software testing techniques that find security flaws by inputting invalid values or arbitrary values into the program and various methods have been suggested to increase the efficiency of such fuzzing. In this paper, focusing on the existence of field with high relevance to coverage and software crash, we propose a new method for intensively fuzzing corresponding field part while performing field based fuzzing. In this case, we use a deep learning model called Variational Autoencoder(VAE) to learn the statistical characteristic of input values measured in high coverage and it showed that the coverage of the regenerated files are uniformly higher than that of simple variation. It also showed that new crash could be found by learning the statistical characteristic of the files in which the crash occurred and applying the dropout during the regeneration. Experimental results showed that the coverage is about 10% higher than the files in the queue of the AFL fuzzing tool and in the Hwpviewer binary, we found two new crashes using two crashes that found at the initial fuzzing phase.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.582-585
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• 2017

본 논문에서는 구글 드라이브, 드롭박스 등 여러 회사에서 제공하고 있는 클라우드들을 하나의 플랫폼으로 통합하여 체계적이고 효율적으로 관리할 수 있는 시스템을 제안한다. 또한 해당 시스템을 통한 파일 업로드 및 다운로드를 진행할 경우, 파일을 여러 개의 패킷으로 분할하여 등록 된 클라우드에 각각 저장함으로써, 사용자의 데이터를 안전하게 보호할 수 있는 환경을 구축하고자 한다. 이를 위해 활용된 오픈 API와 독자적으로 구축한 파일 시스템에 대해 설명하고, 실제 구현한 소프트웨어가 정상적으로 작동하는지 실험을 통해 검증하고자 한다. 최근 클라우드 보안 문제가 대두되는 시점에서 제안한 시스템이 향후 데이터를 보호하기 위한 기술로 활용될 수 있기를 기대한다.