• 디지털융복합연구
• /
• 제10권5호
• /
• pp.251-266
• /
• 2012

위치정보란 특정한 물건이나 개인이 특정한 시점에 존재하거나 존재하였던 장소에 관한 정보이다. 스마트폰이 대중화되면서 위치정보는 단순히 장소에 관한 정보를 넘어서 개인의 위치정보를 이용한 서비스가 대세를 이루고 있다. 그러나, 개인정보의 유출로 야기되는 문제는 금전적 경제적 손실을 넘어서 개인의 이동경로 혹은 개인의 위치를 직접적으로 확인할 수 있는 정보이기 때문에 개인의 신상에 영향을 미칠 수도 있다. 개인위치정보의 관리를 위한 위치기반 서비스들을 통제할 수 있는 가이드 등이 부족한 현실이다. 따라서 본 논문에서는 개인의 위치정보 침해 및 유 노출을 사전에 통제하기 위해 정보시스템 분석 설계 운영 단계에서 개인위치정보에 감리를 수행할 때, 사법처리기준, 재무손실등급, 개인위치정보 중요도, 점검항목의 중요도가 포함된 점검항목을 제안하였으며, 전문가들의 설문 조사를 통하여 제안한 점검항목에 대한 적합성을 검증하였다.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제9권3호
• /
• pp.198-205
• /
• 2009

In this paper, design of framework architecture of pervasive computing system providing seamless inter space interactions between private and public smart spaces is presented. The seamless inter space interaction issues are related to establishing user's service environment by allocating relevant resources in a new location where there are no prior settings for the user or where there are current users already being served in the new location. In the realm of pervasive computing, we can have different types of smart spaces, offering proactive and intelligent services, which are islands of smart spaces independent from each other. As users move about, they will have to roam from private smart space to public smart space and vice versa. When they enter a new island of smart space, they will have to setup their devices and service manually to get the same or different services they had at the previous location. Users might be living in a non-pervasive computing environment because this manual operation is inappropriate to its generic features of proactive and intelligent services of pervasive computing. The framework architecture will provide seamless inter space interactions initiated by changes in users' location to acquire negotiations of resources for new and current residents regarding service provision with limited available networked devices.

• 한국통신학회논문지
• /
• 제38A권12호
• /
• pp.1021-1029
• /
• 2013

본 논문에서는 핑거프린트(fingerprint)기법과 전파 예측 모델을 결합한 무선랜 기반 실내 위치추정 기법을 제안한다. 실내에 설치된 무선랜 AP(access point)는 공용 AP와 사설 AP로 구분되고, 설치 위치가 고정된 공용 AP의 경우 핑거프린트 방식을 적용하기 용이하지만 사설 AP의 경우 위치가 임의로 변경될 수 있으므로 핑거프린트 방식을 적용하기 힘들다. 제안된 방식에서는 공용 AP로부터 수신된 신호에 핑거프린트 방식을 적용하고, 사설 AP로부터 수신된 신호에 전파 예측 모델을 적용하여 공용 AP와 사설 AP를 모두 이용함으로써 위치 추정 정확도를 높인다. 무선랜 환경에서의 데이터 실측과 모의실험을 통해 기존 실내 위치 추정 방식과 제안된 방식의 성능을 비교한다.

• 디지털산업정보학회논문지
• /
• 제10권3호
• /
• pp.151-159
• /
• 2014

Recently, spread of large amount Smartphones made users to download location-based service applications, which provided by application developers. These location-based service applications are convenient tool for users. Location-based service use technology to find location of user and provide information of user's location. Leakage of information of user's location and expose of privacy life raised new controversy. In this thesis, it will analyze relations of increase of Smartphone market, usage of Location-based service and severity of personal information leakage. Also, it will analyze examples of user's case of damage which caused by leakage personal information and find solutions to reduce damage of personal information leakage. In research, it will find cases of damage that cause by Location-based service. Also it will analyze and research cases of damage and present with graph and chart. In conclusion, to reduce and prevent from damage which caused by leakage personal information, it is important that users and application developers to realize danger of private and personal information leakage. Also, user's personal information must deal with cautiously and application developers have to research and develop the application with powerful security.

• 한국통신학회논문지
• /
• 제28권6A호
• /
• pp.361-370
• /
• 2003

본 논문에서는 PNNI(Private Network to Network Interface) 기반의 무선 ATM 망에서 단말의 이동성을 보장하기 위해 기존의 위치 등록기 구조를 개선하고자 한다. 기존의 위치 등록기 구조는 위치 등록기를 물리적 계층으로 배치함으로 인해 다수의 데이터베이스가 요구되고, 데이터베이스 액세스 회수와 신호 트래픽 및 호 설정 지연 등이 증가하는 문제점을 갖고 있었다. 이 문제점을 보완하기 위해 본 논문에서는 논리적 계층 형태로 이루어진 위치 등록기 구조를 제시하고자 한다. 제안된 논리적 계층 구조에서는 위치 등록기를 논리적인 그룹으로 묶고, 이 그룹들을 다시 그룹으로 묶어서 위치 등록기의 논리적인 트리 형태로 만들어 상위 레벨의 위치 등록기의 역할을 하위 레벨의 위치 등록기 중 하나가 수행하도록 하고 있다. 기존의 위치 등록기 구조와 성능을 비교한 결과에서 제안된 논리적 계층 구조는 데이터베이스 수와 위치 관리비용 측면에서 우수한 성능을 보여주고 있다.

• 정보처리학회논문지C
• /
• 제18C권5호
• /
• pp.327-330
• /
• 2011

기존 휴대폰에 비해 강력한 연산능력을 가진 스마트폰의 출시 이후 개인 컴퓨터에서 제공되던 온라인 서비스의 영역이 점차 스마트폰으로 확산되고 있는 추세이다. 이러한 기술의 발전은 사용자에게 서비스제공의 시간 및 공간적 제한을 없애 주었지만, 악의적 공격에 쉽게 노출되는 보안상의 취약점을 가진다. 특히 금융권 서비스 이용 시 사용자의 비밀 정보가 교환되므로 더욱 주의를 기울여야 한다. 이러한 보안 문제를 해결하기 위해서는 하나의 세션에 하나의 비밀 키만을 사용하는 OTP(One Time Pad)가 권장되고 있다. 지금까지 스마트 폰에서의 OTP기법들은 기존 환경에 초점을 맞추어 제안 및 구현되어 왔다. 하지만 모바일 환경에서의 보안은 기존 시스템에 비해 공격에 취약할 뿐 아니라 자원적인 한계점을 가진다. 따라서 스마트폰에 적합한 새로운 개념의 OTP의 도입이 요구되어 진다. 본 논문에서는 시간동기화를 통한 T-OTP(Time One Time Pad) 기법과 위치기반 정보를 접목한 L-OTP(Location-OTP) 프로토콜을 제시한다. 제안된 방식은 스마트폰에서 사용자가 가지는 유일한 위치정보를 통해 OTP를 생성한다.

• 보건행정학회지
• /
• 제9권3호
• /
• pp.21-32
• /
• 1999

The purpose of this study is to assess individual decisive factors for distribution of medical specialists in Korea. A data set was constructed using several published data sources. including the Korean Medical Association's physician master file as a principal source for physician information. Linear logistic regression analysis was performed to assess the relationship between the location of private specialist clinic for practice with six variables related with individual characteristics: age. sex. location of postgraduate training hospital. location of medical school graduated, size of hospital for training, and specialty. Analysis showed that location of practice. classified into urban and rural areas, was significantly associated with the variables of sex. location of postgraduate training hospital. location of medical school. In addition, significant association was found between the location of practice which was categorized into "near-Seoul area" and others, and sex, location of postgraduate training hospital. and location of medical school. We could conclude that to improve area maldistribution of physicians locations of hospitals for training and medical schools have to have the highest priority in the policymaking.icymaking.

• 한국조리학회지
• /
• 제11권1호
• /
• pp.105-118
• /
• 2005

The research is on the satisfaction of the students in culinary academy education which provides basic information about the operation of an efficient private culinary school, training qualified cooks. In this research, it is found that four factors which influenced on satisfaction about private culinary schools: service, environment, operation, advertisement. Students choose private culinary schools considering educational contents, sincerity and kindness of staffs, location and tuition fees. This kind of studies should go on for the private culinary academy to have efficient education environment and for educators and staff members in the private culinary academy to feel pride as an educator who takes charge in social education.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제16권5호
• /
• pp.1653-1670
• /
• 2022

The fear that location privacy may be compromised greatly hinders the development of location-based service. Accordingly, some schemes based on the distributed architecture in peer-to-peer network for location privacy protection are proposed. Most of them assume that mobile terminals are mutually trusted, but this does not conform to realistic scenes, and they cannot make requirements for the level of location privacy protection. Therefore, this paper proposes a scheme for location attribute-based security authentication and private sharing data group, so that they trust each other in peer-to-peer network and the trusted but curious mobile terminal cannot access the initiator's query request. A new identifier is designed to allow mobile terminals to customize the protection strength. In addition, the caching mechanism is introduced considering the cache capacity, and a cache replacement policy based on deep reinforcement learning is proposed to reduce communications with location-based service server for achieving location privacy protection. Experiments show the effectiveness and efficiency of the proposed scheme.

• 한국IT서비스학회지
• /
• 제14권4호
• /
• pp.257-267
• /
• 2015

We propose a vehicle-mounted, location-aware mobile digital signage system that can be used for public transportation through mobile communication. This paper proposes the installations of the LED display panels at the backside of the bus., which display traffic information to cars behind the bus. Information to be displayed would include, but is not limited to, road information, public commercials and private commercials. We propose the system architecture and further implement the prototype of mobile digital signage system for demonstration. The system is based on the Client-Server system. Each bus has a client terminal which detects the current location by a GPS receiver and sends its location information to the server using mobile communication function. The terminal device receives advertisements and traffic information from the server and displays it to the large LCD or LED panel installed at the inside and outside of the bus. We use the Android smartphone as a client system, which inherently equipped with GPS and mobile communication function. GPS detects the location of bus and reports its geo-location data to the traffic information center server via a wireless communication network. On the server side, we developed a specially designed control server, where it communicates with the other traffic information center and updates and manages the databases contents being displayed by each position. The server contains location dependent variable information and returns selected information back to the vehicle in real time. Spatial database is used to process location based data. Server system periodically receives the real time traffic information from the road information center database. And it process the information by bus location and bus line number. In this paper, we propose a mobile digital signage service and explain the system implementation of this service.