• Journal of the Korea Society of Computer and Information
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• v.18 no.10
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• pp.89-95
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• 2013

Smoking in elevators is a criminal offense that is included in a misdemeanor. Because of that smoking in elevators can be very critical for our growing children and weak women. In this paper, we would like to extract criminals doing this criminal offense to smoke in elevators. Extraction method detect difference value using modified color-X2-test and it was normalized. Next, we find frames that has occurred scene change in successive frames using the four-step algorithm of scene change detection. Finally, we present the method of smoking image retrieval and extraction in stored large amount of video. In the experiment, we show process and number of scene change detection, and the number of video searched per retrieval time. The extracted smoking video is to submit as evidence for the police or court.

• Journal of the Korea Society of Computer and Information
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• v.10 no.3 s.35
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• pp.307-318
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• 2005

Cyber crimes caused unpredictable damages by influencing targets with means such as hacking and virus in virtual space. In specific, they transcend time and space because of their anonymity and it is difficult to punish the people who are involved in crimes. To manage such cyber crimes, we need an international cooperative systems beyond difference in legal systems between countries and 'Global Governance' was prepared as a reasonable alternative. These days, governance has been presented as an important concept to explain changed social systems or changed roles of government. It was not just a concept to replace traditional government of a single nation, but to overcome new problems on social actions of humans. So it is expected that it can help prepare reasonable measures through cooperation both in individuals and systems, and public and civil sectors. To countermeasure cyber crimes in terms of global governance, we can prepare general investigation systems and professional human resources through civil and public assistance, and provide a base on which international cooperation systems can be established.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.3
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• pp.717-727
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• 2018

When illegal transactions are made with bitcoin, it's not easy to track all the bitcoins used in the transaction and seize them. Especially, if criminals distribute illegal transactions by spreading them to several bitcoin addresses, it's difficult to track hidden bitcoins other than confiscated bitcoins even if some bitcoins are confiscated. This paper proposes a method for tracking and monitoring all bitcoin transactions suspected of illegal transactions. This method estimates bitcoin addresses that are highly relevant to crime among all bitcoin addresses that dealing with the address based on the bitcoin address list of the alleged crime, and keeps track of addresses that are relevant to crime and help to investigate illegal bitcoin transaction.

• Convergence Security Journal
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• v.7 no.2
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• pp.65-71
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• 2007

Recently, security softwares are the program that is to protect the users from hackers in using electronic financial services. However heackers commit financial crimes to extort asserts using known hacking skills. In our paper, we analyse vulnerability that can be used to hook financial information in user application area and explain end-to-end encryption which is able to be provided by interacting keyboard security program and PKI application program.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.510-512
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• 2015

Recently, people fear is growing because of the various crimes that may occur when you go out. The growing is interest in security systems for the protection of an individual's property. In this paper, to establish a single central server based on the home network when intruders access to city, such as image processing values obtained through the IP camera and distance values disciplined use an ultrasonic sensor the user for an attacker city that will connect to the server the surveillance system provides the information that is received and implemented.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.1941-1944
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• 2003

인터넷이 생활의 한 부분이 되면서 인터넷 사용자가 급증함에 따라 각종 사이버 범죄의 발생 건수 역시 크게 증가하고 있다 이러한 각종 사이버 범죄에 대응함에 있어서 가장 심각한 문제 중의 하나는 해커가 어떤 기술을 이용하여, 어떠한 방식으로 해킹을 진행하는지에 대한 정보가 매우 부족하다는 것이다. 현재 해커들은 해킹에 성공하기 위해 고도의 해킹 기법과 새로운 취약점을 이용하고 있는 반면, 해킹 방지를 위해 사용되고 있는 보안 강화 시스템들은 새로운 방식을 이용하는 해킹 시도를 효율적으로 방어하지 못하고 있는 것이 현실이다. 이와 같은 문제점을 해결하기 위해 제안된 것이 해커의 행동 양식에 대한 정보를 얻기 위한 침입유도 시스템(Honeypot)이다. 그러나 기존의 침입유도 시스템은 해커의 행동 양식 파악에 전문적인 기술이 필요하여 실시간 정보분석이 용이하지 못했다. 이에 본 논문에서는 해커의 행동양식을 실시간으로 파악하고 분석하는 허니넷(Honeynet) 형태의 침입자 행동양식 파악 시스템(Honeypot)을 설계하고 개발하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.473-476
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• 2014

최근 여성, 아동을 대상으로 한 범죄 발생률이 증가 하고 있다. 이러한 통계를 기반으로 우리 생활 깊숙이 자리 매김한 스마트 폰 애플리케이션을 활용하여 범죄를 예방에 도움을 줄 수 있는 애플리케이션을 개발 하였다. SQLite를 이용한 Database기능과 Google API Package의 MapView를 사용하여 지인의 정보를 놓고 언제든지 사용자의 위치정보를 빠르게 전달할 수 있는 앱을 구현 하여 주기적인 위치전송으로 인한 사용자의 위치파악이 가능하고, 위급상황 시 긴급전화를 이용하여 사고 대처가 가능하며, GPS를 이용한 본인의 위치 주변 지리 파악이 용이하다. 또한 수신자가 발신자의 이동경로를 한눈에 봄으로써 위치파악에 용이 함으로 안전한 귀가 서비스를 제공한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.319-321
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• 2019

최근 여성 1인 가구를 대상으로 주거침입 관련 범죄가 꾸준히 발생하고 있다. 이러한 범죄를 예방하기 위한 한 방법으로는 특정 구역, 위치를 감시하기 위한 목적으로 CCTV(Closed-circuit television)를 설치하는 방법이 있다. 하지만 일반적인 가정용 CCTV의 경우 사용자 커스터마이징이 제한되어 있다. 따라서 본 논문에서는 저비용의 커스터마이징이 가능한 양방향 통신 기반 침입자탐지 시스템을 제안한다.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.392-400
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• 2019

The aim of this study is to estimate the recognition of ex-prisoners and experts on rehabilitation programs and family support programs by Korea Rehabilitation Agency, which plays a responsible role in promoting social reintegration. Estimation and comparison method was used to assess between the efficiency and the importance of the rehabilitation business which was respectively recognized by ex-prisoners and experts. The subjects of this study who have received the support from the agency were composed, and the effectiveness was identified. In addition, to measure the importance of the rehabilitation business, a group of experts were made up of professors, the agency employees, and correctional officers with expertise and experience of this field of reintegration and recidivism. Collected data were shown in quadrants by setting preference and importance on each axis through IPA. As a result, there was a significant difference between the preference and importance, and based on this result, the discussion was suggested in relation to the rehabilitation business and family support business.

• Journal of the Korean Institute of Landscape Architecture
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• v.47 no.1
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• pp.49-56
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• 2019

Urban green spaces have been contributing to the improvement of environmental, mental, and physical health for humans. In addition, recent studies showed the potential role of vegetation in reducing the amount of crime in inner-city neighborhoods at the micro-scale level. However, little is known about the positive role of urban green areas in improving urban safety at the regional level. The purpose of this study is to examine the relationship between urban green areas and actual outdoor crime rates, while also considering socio-demographic factors. The study area is the city of Austin, Texas, USA, which consists of 506 block groups. This study utilized socio-demographic factors based on U.S. Census data and vegetation-related factors utilizing GIS and ENVI software. For analyses, the analysis of variance (ANOVA) and an ordinary least square (OLS) regression were utilized. The results from ANOVA showed that yearly crime rates per acre for areas having 0%~25% trees in their neighborhoods were 0.46% and 1.05% higher than those of having 25%~50% and >50% trees in the neighborhoods, respectively. The results from the OLS regression represented that income, NDVI and park rates in neighborhoods were negatively associated with the crime rate per acre, whereas the percentage of minorities and the percentage of teenage school dropouts were positively associated with the crime rate per acre. This study implies that urban green areas may help to improve the safety of urban areas.