• KIPS Transactions on Computer and Communication Systems
• /
• v.9 no.7
• /
• pp.149-156
• /
• 2020

All operating systems have privileged administrator accounts for efficient management. Dangerous or sensitive tasks or resources should be banned from normal users and should only be accessible by administrators. One example of this privilege is to reset a user's password when the user loses his/her password. In this paper, the privileges of the sudoer group, the administrator group of Linux Ubuntu, and the management system of the sudoer group were analyzed. We show the danger that a sudoer can use the privilege to change the password of other users, including other sudoers, and modify the log, and suggest a countermeasure to prevent the manipulation of shadow files as a solution to this. In addition, the proposed method was implemented and the possibility of practical use was confirmed with excellent performance.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2024.05a
• /
• pp.621-622
• /
• 2024

본 논문은 Exemplar Transformer를 활용하여 단일 프로세서 환경에서 동작하는 시각적 객체 추적(Visual Object Tracking) 모델인 ETTrack(Exemplar Transformer Track)을 리눅스(우분투 20.04) 운영체제를 사용하는 임베디드 시스템 라떼판다 알파(LattePanda Alpha)에 탑재하였다. 데스크톱 프로세서인 Intel i7-8700와 라떼판다 알파의 Intel m3-8100y에서의 객체 추적 성능과 속도를 AUC(Area Under the ROC Curve)와 FPS를 통해서 비교평가하였다. 평가 결과 기존 트랜스포머 기반 추적 모델(TransT)과 유사한 성능, 3 FPS 빠른 추적 속도를 나타내는 것을 구현 증명하였다.

• Journal of Digital Contents Society
• /
• v.17 no.2
• /
• pp.97-103
• /
• 2016

This work introduces techniques experienced for the electrocardiogram(ECG) visual analysis, able to characterize the major parameters and events with clinical relevance for heart failure management and cardiovascular risk assessment. In particular, it includes approaches for ECG data visual processing such as the variable charts, graphs base on the complex MIT-BIH ECG database. Through the experienced this works of ECG database visualization, so many researcher more easily access the complex ECG database and can intuitionally understand the meanings via a variable ECG visualized data.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.7
• /
• pp.623-628
• /
• 2016

Because the log information provides some critical clues for solving the problem of illegal system access, it is very important for a system administrator to gather and analyze the log data. In a Linux system, the syslog utility has been used to gather various kinds of log data. Unfortunately, there is a limitation that a system administrator should rely on the services only provided by the syslog utility. To overcome this limitation, this paper suggests a syslog agent that allows the system administrator to gather log information for file access that is not serviced by syslog utility. The basic concept of the suggested syslog agent is that after creating a FUSE, it stores the accessed information of the files under the directory on which FUSE has been mounted into the log file via syslog utility. To review its functional validity, a FUSE file system was implemented on Linux (Ubunt 14.04), and the log information of a file access was collected and confirmed.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.18 no.5
• /
• pp.1231-1236
• /
• 2014

Recently, diffusion and proliferation of mobile devices increases, per person n opens for the mobile device era. Mobile devices and OS types of continuously growing trend. More than 80% of market share with Google's Android and Apple's iOS as well as Samsung and Intel is developing TIZEN, Linux and Mobile was the UBUNTU which UBUNTU for Phone, UBUNTU touch, Mozilla 's Firefox OS, Microsoft 's windows mobile and many more OS are ahead of the launch. But different OS can share files between systems or technology is not. Bluetooth or WIFI Direct such technologies are present but can be transferred between compatible devices low, resulting in constraints file types also exist. In this paper, is equipped with a WiFi card in an environment where the Android mobile OS party this model and method for sharing files between different research and can share the file system based on research on.