• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.6
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• pp.1341-1351
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• 2015

As the popularization of smartphone increases the number of various applications, the number of malicious applications also grows rapidly through the third party App Market or black market. This paper suggests an investigation filter, Androfilter, that detects the fabrication of APK file effectively. Whereas the most of antivirus software uses a separate server to collect, analyze, and update malicious applications, Androfilter assumes Google Play as the trusted party and verifies integrity of an application through a simple query to Google Play. Experiment results show that Androfilter blocks brand new malicious applications that have not been reported yet as well as known malicious applications.

• Journal of Information Technology Applications and Management
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• v.10 no.3
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• pp.1-22
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• 2003

P2P systems have been studied by many researchers in universities and commercial firms in recent years. In this study. we design and implement a system that makes UP for shortcomings of currently available P2P systems. Gnutella and Napster. The study also includes an efficiency analysis scheme conducted through a series of experimental data. The data sharing system of the study demonstrated duality of roles(client, service) of peers. But, their roles were separated from the existing client-server systems. Also, the study implements mechanism that shows the redundancy of data to communicate efficiently among peers for transferring data. The results of performance measure of the system shows that the amount of information shared by peers increases as the amount of peers increases but with no significant increase in response time. This constant response time is far more stable and faster than current file sharing systems. such as Gnutella and Napster. Business applications such as knowledge management, enterprise information portal management and transfer of data are done by use of supercomputers. They need to extend their systems to equip with more capacity and throughput as the number of clients increases. Moreover, they will face with more complicated problems if integration with new systems exists. If this JDSS is introduced to these business applications. it would easily augment scalability of the system with high performance at less expense.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.4 no.3
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• pp.150-154
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• 2003

This paper designs the secure FTP model which provides origin non-repudiation and receipt non-repudiation service that sender and recipient profit of each other to prevent the repudiated of transmission of message and which provides the delivery non-repudiation service to prevent the repudiated of file reception and fact of the transmission failure of an error from the network. The FTP model which is designed to use the GSS-API and in order to have compatibility from source level, with security service it provided the interface which is consistent, establishes the secure context which application client and application server for is safe the session key which overhead from opening to the public key system with efficient key use and it used it minimized.

• Journal of Korea Multimedia Society
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• v.1 no.2
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• pp.204-214
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• 1998

The existing tutoring estimation systems using the authoring tools or HTML forms on the Web environment don't have been improved inconvenient factors of uni-directional interactive systems. In this paper, we design and implement the interactive tutoring estimation system which is conveniently considered to user on the internet environment. The proposed system is divided into teacher and student modules, which have the functions of the new problem insertion and deletion in database, regular examination marking for the former and lecture/test selection, scoring look, etc for the letter. The environment of server system in this thesis is implemented using the IDC file and SQL database for internet access based on Windows NT, client systems are composed to Windows 95 environment based on Explorer or Netscape to access for interactive tutoring systems.

• The Journal of the Korea Contents Association
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• v.16 no.5
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• pp.13-20
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• 2016

Most software is distributed as a binary file format, so reverse engineering is not easy. But Android is based on the Java and running on virtual machine. So, Android applications can be analyzed by reverse engineering tools. To overcome this problem, various obfuscation techniques are developed. In android environment, the Proguard is most widely used because it is included in the Android SDK distribution package. The Proguard can protect the Java source code from reverse engineering analysis. But it has no function to protect resources like images, sounds and databases. In this paper, we proposed and implemented resource obfuscation framework to protect resources of android application. We expect that this framework can protect android resources effectively.

• Proceedings of the KOSOMBE Conference
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• v.1992 no.05
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• pp.152-154
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• 1992

We computerized outpatient's prescription using personal computer and local area network(LAN). The information and history of patient which is stored in the HOST computer is transfered to the local file server via emulatort & LAN. Then, the computerized outpatient's prescription which is made in each examination room is transfered to the admission of discharge office and pharmacy via LAN. In the admission of discharge office, drug charge is automatically calculated, and the prescription and envelope is printed out automatically in the pharmacy. Using this system, the patient takes the drug faster than before, eventually we improve medical service. Also, this system manage hospital works and administration effectively.

• The KIPS Transactions:PartD
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• v.12D no.3 s.99
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• pp.409-416
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• 2005

Even though development paradigm of software has been changing very fast at the beginning of 21st Centuries, there are just few studies of quality and estimation metrics appropriate for Web environment. So in this study after analyzing the correlation between the size of the final code and property of objects, three industrial real world projects written in ASP have been used for deriving programs with high possibilities of faults. And then the size of programs was analyzed to correlate with the number of classes or the number of methods through linear regression. Among the web software with the complex architecture or server, client and un, type or form file written in Javascript for client has the high correlation and the number of methods is well correlated with the size of final code.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.2
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• pp.282-287
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• 2002

This paper action tracing by techniques to do image sequence component to watch invader based on Mobile internet use. First, detect frame in animation that film fixed area, and make use of image subtraction between two frame that adjoin, segment fixed backing and target who move. Segmentalized foreground object detected and did so that can presume middle value of gouge that is abstracted to position that is specified and watch invader by analyzing action gouge. Those watch information is stored, and made Mobile client send out SMS Message about situation of watch place to server being stored to sensed serial numbers, date, Image file with recording of time.

• Journal of Korean Academic Society of Home Health Care Nursing
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• v.10 no.2
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• pp.141-147
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• 2003

The purpose of this study was to develop and apply a Web-based Nursing Education & Instruction Program to help the clinical nurses improving their knowledge and skills of ostomy care. This program was developed in three different steps: analysis. design. and development. The results of the study were as follows: The analysis step was designed to select the study contents for effective and easy educationthrough the analyses of specialized books. This surveyed and analyzed study contents were categorized into five different sections. Introduction. ostomy classification. ostomy management. elimination management. and life style. After that each section describes necessary information of each category. In the design step. the image files used in this program were created using Adobe Photoshop 6.0. and HTML files were designed and developed using Namo Editor 5.0. In the development step. the developed program was published into Web using FTP (File Transfer Protocol) and then finalized after trial operation for testing of real users. In addition. this Web-based Nursing Education & Instruction Program will be used as excellentand effective tool for continuous and lifelong education in nursingfield. In this study. computer-aided education program was developed for ostomy management and managed at the Web-Server (http://hshong.knu.ac.kr/ostomy) in order to help nurses real-time education in clinical field by this program.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.24-27
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• 2001

Nowadays, increasing demand of the customized products has led to an increased usage of rapid prototyping in the product development. However, the acquisition price of a rapid prototyping equipment is still too high that not every body can afford to buy one. To offer a wide access to the users who need physical prototypes, a connection of the rapid prototyping equipment to the Internet is a viable step. It would allow a large group of customers all over the world to use the manufacturing capability of a service provider offering this kind of manufacturing service. To realize how such an e-manufacturing concept can look like, a LOM-type 3D printer developed at KIST has been used as test site and connected to the Internet. A possible user can log on to the server of the equipment and view his STL file and start the building operation from a remote place. To see whether the operation runs properly, a CCD camera is used to transmit the actual state of operation online. The result so far proves the feasibility of rapid prototyping on the Internet as well as an order-adaptive manufacturing system via web.