• International Journal of Internet, Broadcasting and Communication
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• v.13 no.3
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• pp.118-123
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• 2021

Recently, digital crime is becoming more intelligent, and efficient digital forensic techniques are required to collect evidence for this. In the case of important files related to crime, a specific person may intentionally delete the file. In such a situation, data recovery is a very important procedure that can prove criminal charges. Although there are various methods to recover deleted files, we focuses on the recovery technique using HxD editor. When recovering a deleted file using the HxD editor, check the file structure and access the file data area through calculation. However, there is a possibility that errors such as arithmetic errors may occur when a file approach through calculation is used. Therefore, in this paper, we propose an algorithm that automatically calculates the header and footer of a file after checking the file signature in the root directory for efficient file recovery. If the algorithm proposed in this paper is used, it is expected that the error rate of arithmetic errors in the file recovery process can be reduced.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2008.02a
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• pp.205-208
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• 2008

컴퓨터 포렌식 수사에서 파일 복구는 증거 획득에 중요한 요소이다. 하지만 증거 획득 단계에서 하드 디스크와 같은 저장 매체가 손상되거나 파일이 삭제 된 경우가 많이 존재한다. 이 경우 사용할 수 있는 방법 중에 한 가지가 파일 카빙이다. 파일카빙은 컨텐츠를 알려주는 메타데이터가 손상되거나 없을 때 컨텐츠 및 파일 시그너처를 토대로 파일을 재구성 하는 방법이다. 현재 여러 카빙 알고리즘이 제시되고, 도구들이 나와 있지만 파일이 여러 조각 나 있거나 파일 구조의 Header와 Footer 정보가 없다면 파일 카빙이 힘든 문제점이 있다. 그래서 본 논문에서는 현재의 카빙 알고리즘 및 도구보다 더 넓은 범위를 수용할 수 있는 카빙 알고리즘 설계 방안을 제시 한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.4
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• pp.835-845
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• 2019

File Carving is a technique for attempting to recover a file without metadata, such as a formated storage media or a damaged file system, and generally looks for a specific header / footer signature and data structure of the file. However, file carving is faced with the problem of recovering fragmented files for a long time, and it is very important to propose a solution for digital forensics because important files are relatively fragmented. To overcome these limitations, various carving techniques and tools are continuously being developed, and data sets from various researches and institutions are provided for functional verification. However, existing data sets are ineffective in verifying tools because of their limited environmental conditions. Therefore, this paper refers to the importance of fragmented file carving and develops 16 images for carving tool verification based on scenarios. The developed images' carving rate and accuracy of each media is shown through Foremost which is well known as a commercial carving tool.

• Journal of Digital Convergence
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• v.16 no.11
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• pp.465-470
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• 2018

This study investigated how layouts can be arranged to improve the user experience in response to changes in the size of responsive webs in a multi - device environment. The layout elements of the responsive web are largely divided into a header, a main concept image, a main content, a sub-content, and a footer. As the screen becomes smaller, the use of drawers and the menu of the scrolling menus rather than the vertical menus will help improve the user experience. The main concept image should be consistent and not lose readability through the use of system fonts. The main content and the sub content should be prevented from being long in the vertical scroll, and the card UI, the table list and the grid list could be alternatively presented for this purpose. Another problem with vertical scrolling is that the placement of user-selectable menus, such as more or new content corrections, is helpful in improving the user experience.