Sojung Oh

Dark web data classification and threat response methods through topic modeling evaluation

Soonwook Kim, Sojung Oh, M. Y. Choi, Hyungbin Kim et autres

The dark web is an anonymous network in which criminal-related information, including hacking tools, financial fraud data, and illicit content, is actively distributed. Owing to its large-scale and unstructured nature, effective classification and analysis remain challenging. This study compared and evaluated topic-modeling …

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Empirical analysis of domestic drug distribution structures in anonymous networks and countermeasures

M. Y. Choi, Sojung Oh, Soonwook Kim, Junghun Lee et autres

The dark web serves as a primary marketplace for illegal content such as drugs, child sexual exploitation materials, and personal information. However, its anonymous communication structure poses structural limitations for investigative agencies attempting to track it. Particularly in South Korea, the drug …

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Forensic detection of medical image manipulation using PACS and DICOM artifacts

Sojung Oh, Eunji Lee, Seo Yeon Lee, Jaehyun Park et autres

With the digitization of medical information, illegal activities such as medical crimes and insurance fraud through tampering have increased. Medical images are particularly vulnerable due to their nature as soft copies and their transmission over networks. National research institutions such as NIST …

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Standard Model for Mobile Forensic Image Development

Sojung Oh, Eunjin Kim, Eunji Lee, Yeongseong Kim et autres

As mobile forensics has emerged as an essential technique, the demand for technology development, education and training is increasing, wherein images are used.Academic societies in South Korea and national institutions in the US and the UK are leading the Mobile Forensic Image …

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Legal Issues in the Introduction of Compelled Decryption According to Device Unlock Limits

Chohee Bae, Sojung Oh, Sohyun Joo, Jiyeon Joo et autres

With the emergence of advanced encryption technologies such as Quantum Cryptography and Full Disk Encryption, an era of strengthening information security has begun.Users respond positively to the advancement of privacy-enhancing technology, on the other hand, investigative agencies have difficulty unveiling the actual …

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Calibration of a Rotating Stereo Line Camera System for Indoor Precise Mapping

Sojung Oh, Jinsoo Shin, Jeongin Kang, Impyeong Lee

본 연구는 실내 정밀 매핑과 정교한 영상 기반 서비스에 활용 가능한 실내의 입체 전방위 영상을 취득하는 시스템과 이에 대한 캘리브레이션 방법을 제안한다. 제안된 시스템은 회전식 스테레오 라인 카메라 방식으로 구성되며, 안정적인 입체시와 객체점의 정밀한 결정에 적합한 입체 전방위 영상을 제공한다. 또한, 제안된 …

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Georeferencing of Indoor Omni-Directional Images Acquired by a Rotating Line Camera

Sojung Oh, Impyeong Lee

회전식 라인 카메라로 취득한 전방위 영상을 실내 공간정보 서비스에 활용하려면 취득한 영상을 실내 좌표계를 기준으로 정교하게 참조할 수 있어야 한다. 이에 본 연구는 실내 전방위 영상의 외부표정요소 - 취득한 시점의 카메라의 위치와 자세를 정확하게 추정 할 수 있는 지오레퍼런싱 방법을 제안한다. 이를 …

Estimation of Camera Extrinsic Parameters of Indoor Omni-Directional Images Acquired by a Rotating Line Camera

Sojung Oh, Impyeong Lee

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Generation of Simulated LIDAR Data via Geometric Sensor Modeling and Simulation

Seong‐Joon Kim, Min-Seong Hong, Impyeong Lee, Sojung Oh