• Journal of Marine Bioscience and Biotechnology
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• v.2 no.4
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• pp.201-208
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• 2007

Polychlorinated biphenyls (PCBs) are anthropogenic contaminants found globally in water, ice, soil, air and sediment. Modern analytical techniques allow us to determine these chemicals in environmental matrices at parts per trillion levels or lower. Environmental forensic on PCBs opens up new avenues of investigation such as transport and fate of water masses in oceans, sedimentation, onset of primary production, migration of marine mammals, their population distribution and pharmacokinetics of drugs inside organisms. By virtue of persistence, bioaccumulation, bioconcentration and structure-activity relationship PCBs emerge as unconventional chemical tracers of new sort.

• Journal of Oral Medicine and Pain
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• v.35 no.2
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• pp.111-117
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• 2010

Forensic odontology in individual identification has been progressing rapidly and its significance has been increasing. But not all individual identification can be done single method solely. Therefore, understanding the advantage and disadvantage of each method is necessary to achieve forensic individual identification properly in each case for it to be applied promptly, economically and precisely. Now We have identified almost 20 case in Busan and Kyeong Nam area in 2008, 2009 and we would like to report some of cases. Finally We will consider role of forensic odontology.

• YAKHAK HOEJI
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• v.59 no.5
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• pp.230-234
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• 2015

This paper includes a review of 555 drug-facilitated sexual assault (DFSA) cases analyzed at the National Forensic Service (NFS), South Korea, between 2006 and 2012. The results of toxicological analyses of blood and urine samples were also reported, and furthermore the results were interpreted with respect to the number of drugs detected. The number of DFSA cases was highest during warmer summer months and the mean age of the victims was 25 years, with 48% being between 20 and 29 years. Accommodations or entertainment places were the most frequent place of the sexual assault (57%); and the assailant was a stranger in 72% of the DFSA cases. Drugs were identified in the blood or urine samples in 145 cases (26%) and sedative-hypnotics, such as benzodiazepines and zolpidem, were the most commonly detected, along with sedative antihistamines such as doxylamine and diphenhydramine. The frequent presence of sedative drugs in biological samples tends to implicate their use in chemical submission. However, interpreting the analytical results in terms of voluntary vs. surreptitious administration of drugs requires further detailed investigation and knowledge of the victim's health status and medication used at the time of event.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.4
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• pp.719-731
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• 2012

One of the most important point in the Internet crime investigation is tracing back and pointing out a criminal host. However, criminals can forge a crime record stored in the crime host, or can utilize malicious applications in order not to leave a crime record. In addition, criminals can change the source IP address of a crime host and deny their involvement. In this study, we suggests the Network Forensic Evidence Generation and Verification Scheme (NFEGVS) to rectify the current limitation of Network Forensic technologies. This scheme can prove who and when the crime has occurred. In addition, this prevents leaking of symmetric key for guaranteeing certification and integrity of Forensic Evidence by proposing the Timestamp Secret Key Distribution Scheme, and minimizes performance degradation of router when generating forensic evidence with the Flow-Based Selection Scheme. In this paper, we implement the proposed scheme and evaluate overall performance of the proposed system.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.207-211
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• 2011

기업들의 비자금 수사를 받기 전에 압수수색 대상 회계 파일의 삭제, 파손 및 은닉하고 있다. 2010년 H 그룹 비자금 조성 사건에서도 삭제된 파일에서 회계처리, 비자금 문제를 발견하였다. 최근에는 Smart Phone의 활성화와 함께 주요 증거물을 Smart Phone에 저장하고 업무를 진행하고 있다. 본 논문에서는 압수수색된 Smart Phone에서 기업의 회계장부를 찾아내고, 삭제한 회계장부를 복원하는 포렌식 수사기술에 관한 연구이다. 기업에 대한 압수수색 준비와 압수 수색, 획득 증거 분석 등의 절차와 포렌식 도구들을 분석한다. Smart Phone 압수수색 후 포렌식 증거 자료 추출 과정과 포렌식 도구를 이용하여 실험하고 포렌식 증거자료를 추출한다. 본 논문을 통해서 Smart Phone 포렌식 기술발전에 기여 하고자 한다.

• Journal of Advanced Navigation Technology
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• v.18 no.1
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• pp.50-55
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• 2014

Recently, importance of digital forensics has increased and using analysis methods of digital evidence in the analysis of evidence of various types. However, analysis time and effort is steadily increasing because personal disk capacity is too big and it has many number of files. Most digital evidence has time property, such as access time, creation time, and modification time. These time information of digital evidence is one of most important factors in the digital forensic area. But if digital examiner simply analyze based on binary source only, it is possible to have wrong result because time has various types. In this paper, we classify various type of time in the digital evidence and describe advanced analysis method based on timeline chart for digital forensic investigation.

• Korean Journal of Clinical Laboratory Science
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• v.42 no.1
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• pp.22-31
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• 2010

The most common sources of biological trace material which are found in crime scene are the human bloodstains. Reliable identification in the forensic casework is important as it provides crucial insights into crime scene reconstruction and can thus contribute towards solving crimes. Blood-stains are routinely tested in forensic practise using various methods including the leucomalachite green (LMG) test, Kastle-Meyer phenolphthalein test, tetramethylbenzidine test, orthotolidine test, or the luminol chemoluminescence test with the latter cleaning attempts. All these presumptive thus indicative but not identifying tests take advantage of the peroxidase-like activity of the heme unit of the hemoglobin molecule in human blood. Therefore, false-positive results can be caused by the presence of strong oxidants, such as chlorine-containing detergents or by true peroxidases (e.g., from plants). In this study, composition for Gum guaiac was evaluated for the forensic identification of bloodstain and compared with the LMG. The sensitivity and specificity of the composition for Gum guaiac were examined more stable in bloodstain. The positive of Composition for Gum guaiac shown even with the 100,000-fold diluted bloodstain, which was no difference in comparison with LMG test. It was shown that composition for Gum guaiac was very stable to resist boiling for 20 minutes and the effect of bacteria did not affect the genetic analysis as well. The above result of the crime scene investigation, composition for Gum guaiac is easily expected to help identifying bloodstain in the evidences.

• Analytical Science and Technology
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• v.12 no.1
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• pp.1001-1010
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• 1999

• Analytical Science and Technology
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• v.9 no.4
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• pp.1093-1109
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• 1996

• Journal of Advanced Navigation Technology
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• v.15 no.5
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• pp.887-892
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• 2011

Recently iPad has been released, so users interest in new portable device is increasing. As markets grow, experts are forecasting a increase of investigation about tablet PC. However iPad forensics is very difficult using existing smart phone forensic softwares. especially, those softwares can't analyze korean mobile application. This paper describes collecting/analyzing technique for iPad.