• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.253-256
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• 2002

본 논문에서는 MMORPG 게임에서 스마트카드를 이용한 시스템을 설계하였다. 스마트카드가 갖고 있는 기능적 특성들을 이용하여 MMORPG 게임에서 시스템 유해 코드 차단 및 개인 사용자의 정보 보호, 서비스 이용에 대한 과금 시스템 구축 등을 위해 기존의 서버-클라이언트 시스템상의 소프트웨어 설치를 통해 이루어졌던 사용자들이 신뢰할 수 없는 과금 체계나 보안 기능이 아닌 하드웨어적인 접근을 통하여 보안적으로 좀더 견고하고 안정적인 시스템을 구축할 수 있도록 하였다.

• Review of KIISC
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• v.26 no.5
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• pp.17-21
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• 2016

아이폰은 애플컴퓨터에서 개발한 스마트폰으로 애플의 데스크톱 운영체제인 OS X를 스마트폰에 맞게 변형한 iOS 운영체제를 사용한다. iOS는 폐쇠성과 높은 보안성 기능을 내장함으로 사용자에게는 개인 정보를 안전하게 보호할 수 있는 장점을 제공하지만, 디지털 포렌식 분석가에게는 분석 시 많은 어려움을 주고 있다. 애플은 2013년 OS X 매버릭스(10.9)를 시작으로 iOS와 OS X간의 기밀 정보 동기화 및 통화/문자 메시지를 연동할 수 있는 기능을 제공하기 시작하였으며, 2016년에 공개된 시에라(10.12)에서도 클립보드 기능 공유 등의 다양한 연동 기능을 제공하고 있다. 이러한 편의 기능은 분석가에게 아이폰 분석이 어려운 상황에서 아이폰 소유주의 OS X 시스템을 분석하여 아이폰의 아티팩트를 확보할 수 있는 한가지 방법이 될 수 있다. 본 논문에서는 아이폰에서만 획득 가능했던 아티팩트인 통화 및 문자 메시지 내역, 패스워드 정보 등이 OS X와 어떻게 연동되는지 알아보고 OS X 분석 만으로 이러한 증거를 확보할 수 있는 기법을 알아보도록 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.459-461
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• 2022

개인 정보 보호가 중요시되는 초연결사회에서는 정보와 사용자를 연결하는 매개체는 적법하지 않은 사용자를 판별할 수 있어야 한다. 본 연구는 그 매개체를 스마트폰으로 삼고 인간의 걸음걸이에 기반한 스마트폰 인증 시스템을 제안한다. 인간의 걸음걸이를 딥러닝 모델 중 하나인 CNN으로 학습시킨 후, 스마트폰에 탑재하여 사용자가 스마트폰을 휴대한 상태로 7초간 걸음으로써 적법한 사용자인지 아닌지의 여부를 판별한다. 본 연구에서 제안한 모델의 평가 지표로는 정확도, 정밀도, 재현율, F1-score를 사용했으며, 그 결과, 위 4개의 평가지표 모두 평균 95% 이상의 결과를 얻었다.

• Journal of Platform Technology
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• v.6 no.3
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• pp.17-22
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• 2018

Smart home is a technology for monitoring and controlling all the information about a house by integrating various home applications like cooling, heating, lighting, kitchen and security systems into a network. Although home appliances have become more convenient to use due to the development of smart home technology, they are also more vulnerable to information security hazards. Unauthorized visitors may have access to any of home appliance to arbitrarily control it or acquire information. This causes serious privacy and security problems, which should be solved to further smart home technology. This present paper proposed a dynamic user access control system for privacy protection in smart homes. The proposed system defines the role of a user of smart home services by automatically identifying the status information of the user and dynamically controls the access range for the service. In this way, the privacy of a user can be protected and the inter-smart device service is effectively provided. Consequently, the proposed dynamic user access control for smart home will improve the security service for protecting privacy in smart home devices.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.34 no.3
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• pp.479-491
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• 2024

Android manufacturers collect diagnostic data to improve the quality of service to users around the world. The content and frequency of diagnostic data collected by these Android manufacturers is unknown. We analyze the diagnostic data collection behavior of Samsung smartphones, which has the largest share of the Android market among smartphone manufacturers, to explain which diagnostic data is communicated to the server via network packets, how the system app that collects the diagnostic data works, and whether the diagnostic data violates user privacy.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.6
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• pp.1551-1560
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• 2016

With the advancement of wearable devices and wireless body are networks, smart healthcare systems based on such technologies have been emerging to effectively monitor patient health and disease progression. In order to implement viable smart healthcare systems, the security and privacy of patient's personal health information must be considered. Yang et al. proposed a privacy-preserving authentication scheme using key-insulation technique for remote health monitoring system, however, key-insulation technique is not properly adapted to their scheme which in turn causes a security pitfall contrary to their assertions. Besides, Yang et al.'s scheme does not guarantee user anonymity against healthcare service provider. Therefore, in this paper, we discuss the security concerns for Yang et al.'s scheme and present an improved anonymous authentication scheme.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.4
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• pp.797-808
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• 2012

In smart work environment, a company provides employees a flexible work environment for tele-working using mobile phone or portable devices. On the other hand, such environment are exposed to the risks which the attacker can intrude into computer systems or leak personal information of smart-workers' and gain a company's sensitive information. To reduce these risks, the security administrator needs to analyze the usage patterns of employees and detect abnormal behaviors by monitoring VPN(Virtual Private Network) access log. This paper proposes a decision support system that can notify the status by using visualization and similarity measure through clustering analysis. On average, 88.7% of abnormal event can be detected by this proposed method. With this proposed system, the security administrator can detect abnormal behaviors of the employees and prevent account theft.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.3
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• pp.195-200
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• 2012

Smart Phone devices offer convenience for users, but present a new set of security issues due to loss or malicious code. In this paper, a mobile cloud system environment is used with existing smart phones in an attempt to solve the problems in a banking environment. In order to prevent financial damages due to loss or personal information leakage by malicious code, a mobile cloud computing service that provides control and protection of personal information in environment that ensures individual authentication is used. Existing ID / Password with certificate, with the way smart phone dual password authentication scheme using the gyro sensors proposed.

• Review of KIISC
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• v.20 no.3
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• pp.9-17
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• 2010

본 논문에서는 현재 산업체뿐 만 아니라, 개인 생활에 많은 영향을 미치고 있는 영상보안 산업의 기술 현황을 살펴보고, IP 환경으로 진화함에 따른 차세대 영상보안시스템이 가져야할 요구사항과 이에 대한 국내외 기술개발 현황을 살펴보았다. 특히, 영상보안 기술의 발전 방향으로 예상되는 고해상도 네트워크 카메라, NVR, 그리고 차세대 영상보안을 선도할 스마트카메라 기술에 대해 분석하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.3
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• pp.1740-1748
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• 2014

In this paper, we propose an RBAC based personalized health care service platform in order to provide smart management of personal health record using smart devices. It helps to guide healthful service and provide useful information according to one's individual health record. Personalized health care services platform supports a healthy lifestyle by measuring personal health information in a hospital clinical, imaging, and drug data, as well as that can be obtained from smart devices. Everyone can enter his health related data in everyday life such as food, sleeping time, mood, movement and exercise so that one can manage his personal health information of modern smart features. In addition, if necessary, personal health information can be provided to the hospital information system and staff with the consent of the individual. It can be contributed to simplify the complex process for remote medical. The proposed platform, which applies role based access control model to protect security and privacy, supports a smart health care services for users by providing personalized health care services through the smart applications.