• Review of KIISC
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• v.25 no.6
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• pp.47-52
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• 2015

최근에 모바일 장치 관련 정보 유출과 더불어 유출된 정보를 악용한 범죄가 빈번하게 일어남에 따라 정보호호에 대한 관심과 중요성이 높아지고 있다. 국내 모바일 장치 관련 사용자 수도 해를 거듭할수록 기하급수적으로 증가하고 있는 추세이며, 이에 따른 모바일 장치의 보안에 대한 중요성 역시 대두되고 있다. 그 중에서도 사용자 측의 모바일 잠금 기술인 비밀번호, PIN, 얼굴 인식 등의 기능을 활용하여 사용자 모바일 장치에 대한 암호 보안 기술을 적용하고 있다. 또한 사용자들의 개인정보를 다루는 서비스 이용이 증가함에 따라 모바일 장치 자체의 보안에 대한 안전한 처리 문제, 편리성, 효율성 등을 고려한 문제점이 대두되고 있다. 본 지에서는 사용자 모바일 장치 잠금 관련 동향을 분석하고, 이와 관련된 모바일 장치 잠금 어플리케이션의 한계점에 대해서 살펴본다. 또한 현 모바일 장치 잠금 시스템이 직면하는 보안성과 편의성의 한계점을 보완하기 위한 위치 정보 기반의 모바일 장치 보안 시스템을 제안한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.04a
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• pp.121-125
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• 2000

본 논문은 자동차 등에 사용중인 원격 잠금장치등과같은 간단한 응용에 적합한 고속동작이 가능하면서 암호학적으로 안전한 새로운 스트림 암호 알고리즘을 제안한다. 스트림 암호 알고리즘에 많이 적용되고 있는 피드백 쉬프트 레지스트(LFSR) 에 비하여 암호학적으로 복잡한 천이 과정을 갖는다는 알려져 있는 셀룰라 오토마타(CA)를 이용하여 의사 랜덤 비트 스트림 생성기 (PRNG)를 구성하였다. 또한 제안된 PRNG 의 안전성 평가를 위해 출력 2진 비트 스트림에 대하여 통계적 검정과 스트립 암호 시스템의 평가를 수행한다.

• Science of Emotion and Sensibility
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• v.17 no.4
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• pp.79-88
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• 2014

Smart-phones have become a vital part of our lives, paying a bill online, shopping using applications, using email and office applications. Therefore, the risk of the leakage of personal informations and the misuse of them becomes high, for the cost of loosing smart-phone. Many types of smart-phone security features such as password, slide-lock, and pattern lock have been introduced. However, those security locks make users not to easily access and use a smart-phone. There is tradeoff between security on one hand, and usability and cost on the other. This paper propose Self-Concealment to solve the tradeoff problem and demonstrate the effect through the experiment. In sum, Self-Concealment lowers smart-phone experience; however increases smart-phone use intension. This paper has implication for proposing new User Experience (UX) construct to resolve the trade-off between security and usability.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.339-340
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• 2021

한 첩씩 복용하는 알약은 복용 여부를 정확히 판별하기 어렵다. 그래서 이러한 상황에서 벗어나고자 만든 스마트 약통을 제안하고 있다. 이 스마트 약통은 약의 오남용을 방지하고, 날짜별 복용 여부를 휴대폰 어플로 알려주는 장점을 가지고 있다. 장기간 복용하는 약은 한 번의 내원으로 많은 양의 약을 처방받아 오기 때문에 기억력이 좋지 않은 어른이 사용하기에 유용하다. 처방 받은 약통에 있는 QR코드를 최초 입력함으써 약 3일 정도의 데이터 수집기간을 통해 평균 복용시간을 인식하고, 평균 복용시간을 인식한 후에 약 먹을 시간을 알려주는 기능을 탑재하였다. 평상시에는 잠금장치를 통해 걸어 열 수 없게 프로그램을 설정하고, 복용시간에만 잠금장치를 해제하여 환자의 약물 오남용을 막고 안전하게 복용할 수 있을 것이다.

• Archives of design research
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• v.17 no.1
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• pp.179-190
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• 2004

The human effort to make personal privacy and safety from outer environment has brought the improvement of security system through the technological development. Especially as a apartment dwelling and lifestyle is general, the role and function of door lock system is more important than ever. The research for user-centered approach and design on the door lock system should be implemented under the circumstances. This study has focused on the development of making safety as well as easy interface to design door lock system. The price also is competitive as compared with other door lock products. The goal of this study is to propose the alternatives not only to develop door lock design but also to search the innovative way of locking system design.

• Information and Communications Magazine
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• v.24 no.11
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• pp.43-50
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• 2007

RFID 기술은 유비쿼터스 사회로 가는 첫걸음으로 인식되면서 많은 연구와 활용방안이 논의되고 있다. 항만 물류의 화물 컨테이너 보호 분야도 그 좋은 예이다. 즉, 화물 컨테이너를 안전하게 잠그고 열며, 화물 정보를 보호하기 위한 전기적 잠금 장치로써 RFID 기술이 활용될 수 있다. 본 고에서는 화물 컨테이너 운송의 안전성을 지원하기 위한 국제 표준화 현황을 살펴보고, 실제 상용화에 박차를 가하고 있는 대표적인 RFID 장치인 전자봉인(eSeal)과 컨테이너 보안장치(CSD)의 기술적 특징에 관하여 논한다. 본 고에서의 주요 관심은 전자 장치로서의 화물 컨테이너 보호용 RFID 태그와 리더 기술이며, 특히 화물 컨테이너의 중요 데이터를 보호하여 컨테이너 운송 시스템의 효율성과 보안성을 동시에 향상시킬 수 있는 데이터 보호 요구사항을 정리하며 결론을 맺는다.

• Journal of the Korean Society for Railway
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• v.11 no.1
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• pp.33-38
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• 2008

To reduce the cost and time of transport in Eurasian railroad networks such as TKR, TCR and TSR owing to the problem of different track gauges (narrow/standard/broad gauge), it is important to develop the gauge-adjustable wheelset system to adapt easily to these gauges. Moreover, freight trains having the gauge-adjustable wheelsets should be passing various curved tracks in railroad networks. Therefore, to assure the safety of the gauge-adjustment whellset system, it is necessary to evaluate integrity of locking parts in the system using stress analysis. This study is focused on analyzing contact stress of locking parts by using FEA(finite element analysis) simulation during the gauge changeover operation and freight trains' service in the curved track, respectively.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.6
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• pp.699-705
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• 2012

The role of a seat belt in a vehicle is to protect the driver from injury when a crash occurs. However when a large crash occurs, the driver slips forward and receives a strong impact. To prevent this situation, improvement of seat belts is essential. In this study, the new concept of a dynamic locking tongue (DLT) for seat belts is developed. The DLT device is used to reduce the impact to the driver's chest by tightening the webbing, so the driver is protected from severe injury in a large crash. First, a finite element model of the DLT device is created using SAMCEF and structural analysis is conducted with boundary conditions similar to those found in experiments. Then, the stress in the DLT device can be calculated. Second, the shape of the DLT device is optimized using the response surface analysis method in order to minimize the stress and weight. The validity of the optimization of the DLT device is verified using structural analysis.

• Journal of the Korea Convergence Society
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• v.12 no.2
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• pp.45-50
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• 2021

In this paper, we propose the development of a smart space security device that can be opened and closed remotely using IoT. Existing space security devices can control opening and closing by breaking hardware or only using button devices or replicated keys. The recent COVID-19 crisis has created several applications for non-contact devices. In this study, we propose the development of a small space security device that has the function of unlocking through an app without touching the device. By transferring the control authority to a smartphone, device that cannot be opened or closed by only operating hardware at the user's option. It is convenient and hygienic because it can be opened and closed using an app without touching the locking device. Multiple security is possible because security can be released using an app after user authentication by fingerprint recognition and pattern input on a smartphone. If the user wishes, after using the app security, the security is released by directly touching a button installed in the safe or space or opening it with a key. In addition, by adding an inactive function to the app, it is designed so that the door of the safe cannot be opened when the key is lost or the small safe is lost. This study is expected to be able to effectively expand the security system by applying variously to objects that require security.

• The Journal of Engineering Geology
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• v.19 no.4
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• pp.433-439
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• 2009

The compressed packer device is designed to improve the underground contamination prevention facilities of ground water wells. As for the device, the installation is simple because of the safety lock device and the compression of the casing are simple the installation is simple. There is no leakage of ground water because the pressure resistance with $4.5\;kg/cm^2$ makes it equipped with the watertightness The single casing is installed and the reaming for grouting is possible with 300 mm excavation so that installation cost can be saved. Silicon rubber is used for the compressed packer so that the extension rate is 590%. In terms of environmental pollution, it is an environmental friendly product which does not contain harmful ingredients such as Pb, Cd, and phenol. below the standard or undetectable level Furthermore, the installation costs are 35 to 62% or lower than the conventional grouting construction method and are 87% or lower than the expansion packer construction method, the new environmental technology No.47 Also, the device is designed to meet the relevant regulations such as Rules on Preserving the Ground Water Quality, The Standard on Jeju Island Ground Water Development and Facility Installation and Management, and The Plan and Guideline on Operating and Managing the Small-Scale Tap Water Facilities of Ministry of Environment and Ministry of Food, Agriculture, Forestry and Fisheries.