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      • A Trustworthy and Computationally Efficient Cloud Service Contract System via Cloud Notary Authorities

        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.

      • 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.

      • KCI등재

        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.

      • KCI등재

        1회 읽기 가능 메모리를 통한 오프라인 방식의 모바일 전자 지불 시스템 설계 및 구현

        박기웅,박규호 한국차세대컴퓨팅학회 2013 한국차세대컴퓨팅학회 논문지 Vol.9 No.1

        기존 온라인 및 오프라인 전자 지불 방식은 인증 및 검증 연산이 네트워크를 통해 이뤄지기 때문에 인프라에 완벽히 독립적이지 못하다. 본 논문에서는 저장된 데이터를 1회에 한하여 읽을 수 있는 메모리인“One-Time Readable Memory(OTM)”를 제안하고 이를 차세대 메모리 개발 플랫폼으로 구현하였다. 이를 기반으로, 기존 전자 지불 방식과 달리, 네트워크를 통한 인증 및 검증연산이 없는 전자 지불 시스템을 디자인 및 구현하였다. OTM에 저장된 화폐 가치에 대응되는 디지털 데이터는 송금자의 전자 지불 매체로부터 읽히는 순간 비가역적으로 삭제됨과 동시에 수취인의 전자 지불 매체로 이동되고 OTM에 저장된 데이터는 OTM으로만 이동이 되기 때문에, 저장된 데이터는 유일성을 지니게 되어, 화폐로서의 역할을 수행할 수 있는 특징을 갖는다. 따라서 본 논문의 전자 화폐 및 전자 지불 시스템은 기존 전자 지불 방식의 네트워크를 이용한 인증 및 검증 연산 없이 신뢰성 있는 방법으로 전자 거래를 수행할 수 있게 된다.

      • KCI등재후보

        DEVS-Based Evaluation for a Proper Selection of Compression and Encryption in Ubiquitous Computing Environment

        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.

      • KCI등재후보

        A Performance Enhanced Privilege Verification Cache for Authorization in Ubiquitous Service Environment

        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.

      • 집중조명 - 제초제 저항성 잡초 및 관리방안

        박기웅,Park, Gi-Ung 한국작물보호협회 2010 자연과 농업 Vol.262 No.-

        저항성 잡초의 발생 및 조기 확산을 방지하기 위한 재배방법이나 제초제 사용요령 등의 지속적으로 교육 홍보가 필요하며, 모니터링과 저항성 발현기작 연구 등을 통해 올바른 진단이 이루어질 수 있도록 정부는 조속히 대책을 수립해야 한다.

      • 현대회화에서 신체성의 활용에 관한 연구

        박기웅,Park Ki-Woong 한국조형예술학회 2004 조형예술학연구 Vol.6 No.-

        Body means 1)the whole structure and substance of a man, animal, or plant 2) the trunk or torso of a man or animal 3) part of garment that covers the trunk 4) the fresh or material substance, as opposed to the spirit. Human body could be distinguished as fresh and spirit. Body has the meaning of physicality. Physical means the bodily and constitution, but in the meaning of constitution there is the content of spirituality. Physicality means the appearing or arising of trace or image or nuance of body. The paintings which are using bodies are 1) directly draw bodies 2) twisting or transformation or nuance of the body and highly upgrade the physical emotion or fantastic bodily nuance 3) directly rubbing artist's body on the surface of painting with pigments to elect tactile specification. These physical art have appeared broadly by various artists, mainly with the social aspects of sex, drug, psycho sexual issues. In case of Joel peter Whitkin, the reason of strong physicality in the art is from the mind of the rejection and resistance of real world which is targeting top, perfect and beauty. Further explanation, being the world which is separated top and under, men and women, beauty and ugly; further in the situation, the hierarchy, terror and pressure began and many difficult problems has derived. The contents of attacking feminists's art works are very obscene to reveal female and male's phallus strongly. Sometime, it is strongly related in the political issues. The physical paintings have strong meanings in the action by hands and feet. It supports that it could reveal the humanity with smell, breath, and traces of bodies. In the bodies, the origin of life begins which gives human life by blood lines and water. Sometime, the physical paintings are made by the blood and urine to stick the physicality for special nuance. The physical paintings are made by the image of penis and clitoris which are related in the image of urinating, ejaculation and sometime is symbolized as pens and candles to drop liquid. The selected painters who are related in physical painting are Jackson Pollock, Andrea Serano, Eve Klein, Francis Bacon, Francesco Clemente, Lichard Long, Jakes & Dinos Chapman, Anselm Kiefer, Kiki Smith and Park, Ki Woong. Francis Bacon's style is destructive in representing human shapes which give us special message about the unbearable activity of men politician, high brain, wealthy and religious people. Francesco Clemente's method is to use throat, ear hole, mouse, clitoris, belly nostrils and every holes of body to transmute human physical body. Lichard Long uses directly his body in drawing the surface of painting by using liquid of mud Jakes & Dinos Chapman destroys or transforms the bodies of human. It sometime appears wrong location of the bodies that the penis and vulva is in between human faces or nose of women, Anselm Kiefer uses human hair for representing the human decaying martyrs, and indirectly using straw, he gives special ritual action to repent the Nazi's fault. From 2002 to 2003, Park KI Woong used women womb images to intermingle the smoke shape of <9.11 terror, 2001> in New York to reveal the painful situation of the time(*).

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