• 정보학연구
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• 제10권3호
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• pp.93-120
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• 2007

A Smart Home is a technically expanded from home network that gives us a comfortable life. But still there is a problem such as mal function of devices and intrusions by malicious parties since it is based on home network. The intrusion by malicious parties causes a critical problem to the individual's privacy. Therefore to take legal actions against to the intruders, the intrusion evidence collecting and managing technology are widely researched in the world. The evidence collecting technology uses the system which was damaged by intruders and that system is used as evidence materials in the court of justice. However the collected evidences are easily modified and damaged in the gathering evidence process, the evidence analysis process and in the court. That's why we have to prove the evidence's integrity to be valuably used in the court. In this paper, we propose a mechanism for securing the reliability and the integrity of digital evidence that can properly support the Computer Forensics. The proposed mechanism shares and manages the digital evidence through mutual authenticating the damaged system, evidence collecting system, evidence managing system and the court(TTP: Trusted Third Party) and provides a secure access control model to establish the secure evidence management policy which assures that the collected evidence has the corresponded legal effect.

• 한국컴퓨터정보학회논문지
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• 제24권3호
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• pp.87-93
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• 2019

In this paper, we propose a real-time drone-based violent protest detection system. Our proposed system uses drones to detect scenes of violent protest in real-time. The important problem is that the victims and violent actions have to be manually searched in videos when the evidence has been collected. Firstly, we focused to solve the limitations of existing collecting evidence devices by using drone to collect evidence live and upload in AWS(Amazon Web Service)[1]. Secondly, we built a Deep Learning based violence detection model from the videos using Yolov3 Feature Pyramid Network for human activity recognition, in order to detect three types of violent action. The built model classifies people with possession of gun, swinging pipe, and violent activity with the accuracy of 92, 91 and 80.5% respectively. This system is expected to significantly save time and human resource of the existing collecting evidence.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.33-34
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• 2006

Computer Forensics is a research area which finds the malicious users by collecting and analyzing the intrusion or infringement evidence of the computer crime. Many research about Computer Forensics has been done. But those research have focussed on how to collect the evidence after receiving the damage reports from computer users or network administrators. This paper describes about collecting the evidence of good quality at the time of infringement occurrence by the malicious user. By calculating Infringement severity of observable and protective hosts and referring to this value, we collect the evidence at the time of infringement occurrence to minimize the information modification of the evidence. We can reduce also the amount of logs that we use to analyze the infringement and can minimize the loss of the evidence.

• 인터넷정보학회논문지
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• 제11권4호
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• pp.129-141
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• 2010

디지털 컴퓨팅 환경에서 가질 수 있는 기기의 오류에 의해 오작동과 악의적인 침해가 발생할 수 있다. 이러한 침해행위는 개인의 사생활을 위협하는 치명적인 요소로 작용한다. 이러한 침해행위에 대한 법적 대응을 위해 침해증거 확보 기술과 관리기술을 세계적으로 연구하고 있다. 침해행위에 대한 증거확보기술은 사건발생 시점을 기준으로 증거 대상시스템을 압수하여 법정에서 증거자료로 활용한다. 그러나 수집된 증거물은 증거물 수집, 증거물 분석, 법정의 영역에서 변조 및 손상에 위험성을 가질 수 있다. 즉, 증거물의 무결성과 대상시스템에서 수집된 증거물이 맞는지에 대한 신뢰성에 문제점을 갖는다. 본 논문에서는 디지털 컴퓨팅 환경에서 시스템의 오작동 및 침해증거를 보호하여 컴퓨터 포렌식스를 지원할 수 있도록, 디지털 증거물의 무결성 및 신뢰성 보증을 위한 기법을 제안한다. 제안한 기법으로는 피해시스템, 증거수집, 증거 관리, 법정(제3의 신뢰기관)의 각 개체간에 상호 인증을 통해 증거물을 관리하고 증거물이 법정에서 법적 효력을 발휘할 수 있도록 접근 통제 보안 모델을 제안하여 안전한 증거물 관리 정책을 수립한다.

• International Journal of Internet, Broadcasting and Communication
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• 제13권3호
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• pp.124-129
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• 2021

As the 4th industrial era is in full swing, the public's interest in related technologies such as artificial intelligence, big data, and block chain is increasing. As artificial intelligence technology is used in various industrial fields, the need for research methods incorporating artificial intelligence technology in related fields is also increasing. Evidence collection among digital forensic investigation techniques is a very important procedure in the investigation process that needs to prove a specific person's suspicions. However, there may be cases in which evidence is damaged due to intentional damage to evidence or other physical reasons, and there is a limit to the collection of evidence in this situation. Therefore, this paper we intends to propose an artificial intelligence-based evidence collection system that analyzes numerous image files reported by citizens in real time to visually check the location, user information, and shooting time of the image files. When this system is applied, it is expected that the evidence expected data collected in real time can be actually used as evidence, and it is also expected that the risk area analysis will be possible through big data analysis.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.463-466
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• 2012

스마트폰(Smartphone)의 발전과 함께 스마트폰을 이용한 범죄도 증거하고 있다. 스마트폰의 내부 저장매체에는 사건에 증거자료로 활용될 수 있는 이미지, 동영상, 통화내역, GPS정보, 인터넷 사용기록 등의 데이터들이 존재한다. 따라서 이러한 데이터들을 수집하기 위한 체계적인 증거수집 및 증거분석에 대한 절차가 필요하다. 본 논문에서는 스마트폰을 대상으로 모바일 포렌식의 포렌식 증거수집, 증거분석, 결과보고서 작성까지의 절차 및 방법에 대해서 도출한다. 본 논문을 통해 스마트폰 포렌식 조사 및 수사에 대한 기초자료로 활용될 것이다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 추계학술대회
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• pp.269-272
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• 2011

스마트폰에 대한 소송이 이루어지고 있고, 최근, 법정에서의 스마트폰 증거데이터에 대한 증거자료 채택이 많아지고 있다. 따라서 불법적인 스마트폰 사용에 대한 증거데이터 추출을 위한 포렌식 절차와 증거물 수집에 대한 연구가 필요하다. 본 논문에서는 스마트폰의 증거데이터 주출에 대한 포렌식 절차를 제시하고, 스마트폰 포렌식 증거를 수집함으로써 디지털 증거의 무결성을 확보하고 사건을 진실을 발견하기 위한 방법에 대해 연구하였다. 본 연구를 통해 스마트폰 포렌식의 발전에 기여할 수 있을 것이다.

• 기본간호학회지
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• 제21권2호
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• pp.112-122
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• 2014

Purpose: The purpose of this study was to examine the effects on body temperature, shivering, and perceived thermal comfort of web-based evidence-based practice guideline for patients undergoing gastrectomy. Methods: Eighty patients scheduled for gastrectomy were recruited and assigned to the control or experimental group by sequential order. Before collecting data from the experimental group, a systematic educational program on evidence-based guidelines was provided to the nurses as well anesthesiologists. Data were analyzed using t-test and repeated measured ANOVA. Results: The experimental group showed higher body temperature from the induction of anesthesia until four hours after surgery compared to the control group. In addition, the levels of thermal comfort as well as satisfaction with thermal management were significantly higher in the experiment group. Conclusion: Use of evidence-based guidelines was effective in maintaining body temperature, lowering sensitivity to shivering, and promoting perceived thermal comfort. Therefore, adoption of evidence-based interventions in nursing practice is recommended.

• 한국동물위생학회지
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• 제35권3호
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• pp.183-189
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• 2012

Tsutsugamushi disease or scrub typhus cause by Orientia tsutsugamushi is an endemic disease in Korea. Chigger mites and field rodents play roles in transmission of the disease by the vector and host of the agent. The purpose of this study is to investigate the density of the chigger mites and field rodents due to environmental factors such as temperature, relative humidity, soil thickness and the various vegetations to the 9 field rodent collection sites. The total 62 field rodents was captured by the Sherman collapsible traps from April to October 2009 at the Jangseong of Jeonnam Province, Korea. The trapping rate of the field rodents by the different collecting sites was dominant at subside storage water (24%), bush near by dam (22%), bank around field (20%), followed by 18% of grassy field and surround cattle shed. The distribution of chigger mites by the different collecting sites was the highest at Bush near by dam (28.7%). And the sites of subside storage water, bank around field and surround cattle shed were 20.4%, 18.8%, 16.4%, respectively. On the other hand the collecting sites of stream bank and ridges between rice paddies were not collected. The temperature to the collecting sites was showed $24.1^{\circ}C$ in June and $24.2^{\circ}C$ in October which was higher than April ($10.6^{\circ}C$), whereas lower than May ($25.3^{\circ}C$) and September ($26.8^{\circ}C$). The highest number of mites was collected at $24.2^{\circ}C$ and 46.6% relative humidity in October. The chigger mites and field rodents were highly collected between 18 and 24% at the sites where are loosely in the superficial layers of the soil from 8.0 cm to 10.2 cm. Total 25 species of vegetation were distributed at the collecting sites. In the present study, strong evidence was found that bank around field and grassy field were provided for the prevalence sites of tsutsugamushi disease.

• 정보보호학회논문지
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• 제28권4호
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• pp.869-878
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• 2018

사이버 공간 내 디지털 증거 데이터는 수정 및 삭제되기 쉬우며 실시간으로 변경사항이 반영되므로 사건 발생 시점 이후 증거 데이터의 빠른 획득이 필요하다. 클라이언트 측에서의 증거 수집은 별도의 행정절차로 인한 시간 지연 없이 데이터를 획득할 수 있다는 장점이 있지만, 대용량 데이터의 수집에 있어서는 마찬가지로 수집 시간 지연 문제에 취약하다. 따라서 본 논문에서는 사이버 공간 내 주요 웹 기반 서비스를 중심으로, 클라이언트 측면에서의 자동화 된 증거 수집 방식을 제안하여 대용량 데이터에 대한 효율적인 증거 수집이 가능하도록 한다. 나아가 제안한 방식을 사용하고 수집한 디지털 증거의 법정제출시점까지의 무결성을 보장하는 사이버 공간 내 디지털 증거 수집 시스템을 제안한다.