• Journal of Korea Multimedia Society
• /
• v.7 no.9
• /
• pp.1282-1293
• /
• 2004

This paper proposes an asymmetric watermarking system using Public Key Infrastructure. The distinguishing characteristic of the proposed method connects between the two different techniques, cryptography technique and watermarking technique, by using the authentication technique. The connection between the two techniques are established based on the special qualities of each technique. Watermarks that are inserted into the digital contents consist of a digital signature described as an encrypted copyright information with the private key of a distributor or a copyright holder, and an authentication code. In the situation where the ownership of the digital contents has to be decided, authentication technique examines the data integrity of the digital contents based on an authentication and decides the ownership of the digital contents by examining whether it satisfies or not satisfies the integrity test. The formal case uses decryption method which compares the user defined copyright information, and the decrypted copyright information extracted from the watermark in the digital contents that are decrypted by distributors' public key The latter case determines the ownership by comparing the similarity between encrypted copyright information separated from the watermark that are extracted from the digital contents, and the user defined encrypted copyright information that are separated from the watermark The proposed method provides protection from the assault which attempts to identify or erase the encoding key.

• Journal of Digital Contents Society
• /
• v.19 no.8
• /
• pp.1617-1623
• /
• 2018

It is necessary to develop a next generation location referencing method with higher accuracy as advanced technologies such as autonomous vehicles require higher accuracy of location data. Thus, we proposed a framework for a lane-level location referencing method (L-LRM) based on high-precision digital road network map, and developed a tool which is capable of analyzing and evaluating the proposed method. Firstly, the necessity and definition of location referencing method was presented, followed by the proposal of an L-LRM framework with a fundamental structure of high-precision digital road network map for the method. Secondly, an architecture of the analysis and evaluation tool was described and then the Windows application program was developed using C/C++ programming language. Finally, we demonstrated the performance of the proposed framework and the application program using two different high precision digital maps with randomly generated road event data.

• Journal of Digital Contents Society
• /
• v.18 no.4
• /
• pp.795-802
• /
• 2017

If the function of the national infrastructure is suspended due to natural disasters and social disasters, the damage of the national infrastructure can be a serious threat to the national security as well as the life, body and property damage of the people. In this paper, we examine the domestic and overseas trends of the national system protection system and examine the domestic and overseas trends of the national system protection system. The detailed function of the essential function continuity, essential function, succession order, authority delegation, continuity facility, continuity communication, We examined the specific issues related to testing, education and training, transferring control and directing authority, analyzing the system related to the national infrastructure protection plan, and examined the specific problems and suggested an effective improvement plan for the critical infrastructure protection system.

• 한국IT서비스학회:학술대회논문집
• /
• 2009.05a
• /
• pp.588-592
• /
• 2009

The latest advances in great revolution for digital media and contents industries with Ubiquitous era. Because of spread and supply of various multimedia devices with combination digital with network, we need various type of digital contents. The Digital contents consists of Middleware industries, network business, contents service presenters and users. For supporting digital media. contents and media devices have been converging Digital contents convergence has been proceeding rapidly in media, broadcast and communication field. And also, whole Environment for these industries has been changing, too. Wee need another digital contents convergence for new type of products and services because of convergence of IT and broadcast. In addition, new business trends is very important about these new industrial change and developments with digital contents convergence.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
• /
• 2003.10a
• /
• pp.335-340
• /
• 2003

Our country is projected the technical development studies, constructed the digital maps, developed standards, established rules, and educated users during the first NGIS plan. This National Geospatial Information Infrastructure is proceeding with the program as arranged. In the second NGIS plan, our government try to construct the framework data for the maximization of GIS utilization. But National Geospatial Information Infrastructure included some problems from view of data framework particularly. In this paper, we make a comparative study of foreign countries, analyze the cause of our problem, and present the standards for Korean National Spatial Data Infrastructure.

• Journal of Korea Multimedia Society
• /
• v.20 no.8
• /
• pp.1456-1463
• /
• 2017

In recent times, IaaS (Infrastructure as a Services) have been rapidly evolving to allow developers to easily and efficiently access work in the server and network areas for development of a web of App based on cloud computing. In this study, we developed the collaborative image editing tool App based on Cloud-computing, by adopting AWS of representative company that develops IaaS. First, it is crucial to understand various situation conditions for representative infrastructure services: AWS, Azure and Google (GCP). This may have the effect of reducing manpower and development time, but as each company has different policy and technical support, we need a new study every time the environment changes of infrastructure services. We tried to develop a hybrid-App so that users with various devices can collaborate work each other by utilizing the infrastructure service AWS through the process of developing the image editing authoring tool based on the cloud computing. The future studies should continue about compatibility issues and support issues in order to minimize the problems of overseas infrastructure services, but we think that domestic cloud computing policies and developments should be urgently considered.

• Journal of Digital Contents Society
• /
• v.19 no.4
• /
• pp.809-814
• /
• 2018

With the proliferation of cloud computing infrastructures, service providers are able to deploy services in on-demand manner. Recently, microservice architecture has been attracting attention in order to maximize the efficiency of resource expansion in cloud infrastructure. Instead of implementing all of the service functions in a single software, service providers can easily and autonomously implement the necessary services by interconnecting the necessary services through an efficiently designed application programming interface (API). Moreover service developer can freely choice programming languages and define software, and functional structures to meet their functional requirements. In this paper, we propose virtual infrastructure manager service based on microservice architecture and evaluates its performance in scalability perspective.

• Journal of Digital Convergence
• /
• v.8 no.3
• /
• pp.169-180
• /
• 2010

The current status of information management and information strategy of an enterprise may determine the future capability of the firm, thus the competitiveness in the market. Especially, in case of SME(small and medium enterprise), the level of information management and strategy gives the company readiness in the ever changing business environment. In this study, we investigate the information infrastructure of SMEs operating in Incheon Metropolitan areas whether they can meet the challenge in terms of network, software, IT education, IT finance, etc. We came up some suggestions which might be good alternatives and choices for IT decision makers in local and central government.

• Journal of Digital Contents Society
• /
• v.14 no.3
• /
• pp.357-365
• /
• 2013

The popularization of smart phones changes the usage patterns of mobile communication from voice-centric to data-centric communication. The demand for wireless data communications is rapidly increasing, and thus the need for expanding infrastructure for mobile communication is also rapidly increasing. In this paper, we propose a scheme for reducing the cost for the mobile communication infrastructure by exploiting opportunistic networks in dissemination of multimedia contents. By using this scheme, the large portion of the cost for mobile communication infrastructure could be saved, and the need of users for multimedia contents could be also fulfilled. Our scheme is evaluated using agent-based simulations. The simulation results show that about 70% of mobile communication can be replaced with the data communication through opportunistic networks.

• Journal of Digital Convergence
• /
• v.11 no.3
• /
• pp.59-71
• /
• 2013

Cloud service (Amazon Web Services, etc.) to take advantage of the growing global competitiveness of small and medium companies with online services (eg Zynga, paprika wrap) are strenthening the growing global competitiveness by taking advantage of cloud utilization, and financial market analysis services by cloud use have appeared, but the domestic company's cloud still staying in the low-level. SMEs in Korea IT infrastructure needs as well as commercial services such as simulation, test environment configuration, to perform tasks that require a step-by-step in the product development process, which requires different IT Infrastructure Outsourcing workforce commitment, according to the rapid changes in the size of the organization's efficient IT infrastructure such as cloud services because of the lack of capacity to respond to a sudden demand for IT measures required.