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TPM 기반 위변조 방지형 디지털 운행기록 장치 설계 및 구현
박기웅 한국차세대컴퓨팅학회 2013 한국차세대컴퓨팅학회 논문지 Vol.9 No.4
디지털 운행기록장치(Digital Tachograph) 보급의 확산에 따라, 신뢰성이 보장된 방법으로 차량 데이터를 기록하는 기술이 요구되고 있다. 특히 2012년 한국에서는, 개정된 교통안전법에 따라 업무용 차량의 디지털 운행기록 장치가 의무화 되었다. 디지털 운행기록장치의 다음 단계에 있어, 네트워크 연동형 디지털 운행기록 장치가 개발되었으며, 이는 실시간 운행 정보(주행시간, 유휴시간, 브레이크 타이밍 등)의 수집 및 그에 기반한 서비스를 제공하기 위한 것이다. 본 논문에서는 위변조 방지형 디지털 운행기록 장치를 디자인하고 구현하였다. 위변조 방지형 디지털 기록을 위해 TPM의 모노토닉 카운터를 활용한 해시체인 기반 로깅 기법을 제안하였으며, 이는 디지털 운행기록장치가 장착된 차량의 운전자조차도 데이터를 위조 또는 수정할 수 없는 보안 기능을 제공한다. 본 논문에서 제안한 방법의 가능성과 연산 효율성을 테스트하기 위해, ARM 프로세서 기반 임베디드 보드에 프로토타입을 구현하였으며, 초당 995.85 로깅 트랜젝션을 처리할 수 있다.
박기웅 대전대학교 기초과학연구소 2013 自然科學 Vol.24 No.-
As advances are made in hardware/software technology, the wearable computing systems are becoming widespread and comes with interesting technology and business applications issues. This creates a demand for more practical wearable computing platform that consider not only aesthetic appearance but also usability. In this paper, we presents a brief survey on wearable computing technologies and its applications, by identifying a variety of fundamental technologies and applications. To achieve it, we investigate the existing technologies and relevant research results in four major areas: platform, user interface, and applications.
Occurrence and distribution of weed species on horticulture fields in Chungnam province of Korea
박기웅,Ki Seon Hwang,Min Yong Eom,Su Hyuk Park,Ok Jae Won,In Yong Lee 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.3
A survey of weed occurrence was conducted to identify problematic weed species in a horticultural crop field to get basic information for effective weed control. Surveys of weed species occurring in horticultural crop fields (garlic, onion, red pepper and Chinese cabbage) were conducted in Chungnam province of Korea from April to October in 2014. A total of 516 sites of the 17 regions were identified as having 114 weed species belonging to 32 families. The most dominant weed species in the horticultural crop fields were Chenopodium album var. centrorubrum (8.83%), followed by Digitaria ciliaris (5.71%), Conyza canadensis (5.46%) and Capsella bursa-pastoris (4.67%). Specifically, as a result of this study, the occurrence of 35 species of exotic weeds, such as Chenopodium album and Taraxacum officinale, were confirmed. Almost 68% of the investigation sites was determined under dominance value 1 (range of cover < 10; numerous individuals) by Braun-Branquet cover-abundance scale, indicating a proper weed control in horticultural crop field. As a result of scientific and technological advances, an improved cultivation method is changing the weed occurrence in agricultural land. Additional research needs to be undertaken for the development of weed control methods through such periodic monitoring of occurrence of weeds.
DEFCON : 개발자 친화적인 Wi-Fi Direct 통신을 위한 안드로이드 라이브러리 설계 및 구현
박기웅,백승훈 한국차세대컴퓨팅학회 2013 한국차세대컴퓨팅학회 논문지 Vol.9 No.6
스마트폰 사용자 간 데이터 공유에 대한 필요성이 증가되고 있다. 스마트폰 사용자들은 HD 비디오, 이미지 데이터를 인근 사용자와 공유를 하는 경우가 많다. 하지만, 두 스마트폰 사용자 간 Wi-Fi Direct를 통한 소켓 기반의 1:1 통신 채널을 형성하기 위해서는, 개발자 측면에서는 네트워크 프로그래밍에 관한 이해가 요구되며, 사용자 측면에서도 장치 간 네트워크를 형성하기 위한 구동 절차가 요구된다. 본 논문에서는 DEFCON이라 명명된 개발자 친화적인 Wi-Fi Direct 통신을 위한 안드로이드 라이브러리를 설계 및 구현하였다. DEFCON은 기존 장치 간 소켓 통신 채널을 형성하기 위한 대부분의 절차를 자동화 시켜 개발자와 사용자로 하여금 장치 간 네트워크 구현을 위한 개발코드 및 사용자 개입을 간소화 시켜주는 효과가 있다.
박기웅,Kyu Ho Park 에스케이텔레콤 (주) 2011 Telecommunications Review Vol.21 No.3
Recording and keeping account of the usage of cloud resources in a trustworthy way are vital requirement for widespread cloud deployment and availability. To provide a trustworthiness of cloud service contracts, we identified that the frequent cryptographic operations for the trustworthy contracts lead to excessive computations and a bottleneck of contract transactions. As a remedy for these limitations, we propose a trustworthy contract system for cloud computing environment. The system, which introduces the concept of a Cloud Notary Authority (CNA) for the supervision of contract, makes contract more objective and acceptable to users and cloud service providers. CNA generates trustworthy binding information that can be used to resolve future disputes between a user and a cloud service provider. Because our contract system drastically minimizes the asymmetric key operations of cloud users and service providers, it provides a level of security that is identical to that of a Public Key Infrastructure (PKI) and it minimizes the latency of contract transactions. This work was undertaken on a real cloud computing service called iCubeCloud.
박기웅,박규호 한국차세대컴퓨팅학회 2008 한국차세대컴퓨팅학회 논문지 Vol.4 No.2
In an attempt to achieve an efficient and secure communication in ubiquitous computing environment, we found that a proper selection of compression and encryption algorithms is a challenging issue. Compression can be beneficial to reduce the number of bits transmitted. If the energy required to compress data is less than the energy required to send it, there is a net energy savings and an increase in battery life for portable computers. On the other hand, encryption is essential operations to provide a secure communication. However, the mobile devices, usually with very limited resources and battery power, are subject to the problem of energy consumption due to compression and encryption algorithms. They consume a significant amount of computing resources such as CPU time, memory, and battery power. In this paper, we present the results of DEVS-based evaluation with symmetric key algorithms (AES, RC4) and compression algorithms (Zlib, LZO, Bzip) that are commonly suggested in terms of processing time and consumed energy.
압력 센싱을 통한 직관적 사용자 인터페이스 디자인 및 유용성 평가
박기웅 대전대학교 기초과학연구소 2012 自然科學 Vol.23 No.-
This paper presents a novel interface driven by a pressure sensor, and its application as a mobile clip-board for intuitive copy-and-paste operations. We designed a ball-shaped interface with handheld size. Sensors and communication modules are embedded in the soft ball to react to the squeezing force of the user and to interact with multiple devices. The user can conduct a copy-and-paste operation among the several devices more intuitively by squeezing and rolling it by hands. We performed an initial user study and found that users can express their intentions intuitively by using the proposed interface.