• Digital Contents
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• no.8 s.15
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• pp.92-94
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• 1994

• Digital Contents
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• no.9 s.16
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• pp.107-121
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• 1994

• Digital Contents
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• no.10 s.17
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• pp.138-150
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• 1994

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.6
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• pp.1259-1266
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• 2013

Nowadays, the databases are getting larger and larger. As the company has difficulty in managing the database, they want to outsource the database to the cloud system. In this case the database security is more important because their database is managed by the cloud service provider. Among database security techniques, the encryption method is a well-certified and established technology for protecting sensitive data. However, once encrypted, the data can no longer be easily queried. The performance of the database depends on how to encrypt the sensitive data, and on the approach for searching, and the retrieval efficiency that is implemented. In this paper we propose the new suitable mechanism to encrypt the database and lookup process on the encrypted database under control of the cloud service provider. This database encryption algorithm uses the bloom filter with the variable keyword based index. Finally, we demonstrate that the proposed algorithm should be useful for database encryption related research and application activities.

• Journal of the Korean Geotechnical Society
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• v.18 no.6
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• pp.43-59
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• 2002

In this study, database systems which were used to select the waterproof method according to leakage patterns of underground structures were built by performing pilot tests, reviewing literatures, and analysing the gathered data statistically. The database was built by using check lists which consisted of 5 major items and 73 subdivided items, and 26 major parameters according to 4 classified grades were determined on the base of survey which considered various in-situ conditions. The database of waterproof methods was comprised of 10 methods which were applied in Korea. From the database of waterproof methods, application ranges and design conditions of waterproof methods were suggested. From the results of study, database system consists of parameters selection database, waterproof method database, and design condition database. From the results of pilot tests, when the database of waterproof methods was applied to design stage, saving time and reducing mistakes for selecting waterproof method were gained. In addition, when the database of waterproof methods was applied to construction stage, effects such as evaluation of applicability of waterproof method, improvement of constructability and post management were expected.

• Asia Marketing Journal
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• v.7 no.3
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• pp.121-141
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• 2005

Most of the people in marketing area know that database marketing has been one of the most powerful marketing tools and thus database marketing industry grows bigger and bigger. For both effective database marketing and database marketing industry, personal data are the very essential resources. Unfortunately, in Korea, both database marketing and database marketing industry stays far behind compared to other countries because it is practically very hard to legally trade personal data for database marketing purpose. Instead Korea has a illegal spam problem which might be a natural consequency of strong restriction on personal data in the situation of huge demand for personal data. KT SODiS can be called the frontier of Korea's database marketing industry since it is the first legal business in this area. In the first 5 months, SODiS obtained 2 millions of legal customer consents which can be the strong base to help database marketing activities of other companies. This case shows marketing strategies of KT SODiS to establish infrastructure for Korea's database marketing industry and suggests some future tasks to further develop the industry.

• The KIPS Transactions:PartD
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• v.11D no.5
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• pp.1041-1048
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• 2004

Database logs contain various information on database operations, but they are used to recover database systems from failures generally. This paper proposes a log analysis tool that provides useful information for database tuning. This tool provides users with information on work-load organization, database schemas, and resources usages of queries. This paper describes the tool in views of its architecture, functions, implementation, and verification. The tool is verified by running the TPC-W benchmark, and representative analysis results are also presented.

• Journal of KIISE:Databases
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• v.29 no.3
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• pp.207-216
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• 2002

Nowadays, we can easily access a remote database as well as a local database with HTML forms. Although implementing a database application with HTML forms is much simpler than implementing it with a proprietary graphical user Interface system, HTML forms and CGI programs still must be coded. We implemented a software tool that automatically generates the SQL statements that create a database for an application, the forms that are used as a user interface, and the Java servlets that retrieve the data requested through the forms. The database tables to be treated and the forms to be generated are determined by the class diagram for the application. Our software tool, which we call WebSiteGen, thus simplifies the implementation of a Web-based database application.

• Journal of Information Technology and Architecture
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• v.11 no.2
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• pp.225-233
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• 2014

In this paper an architecture for 3D audio core algorithm evaluation database system. Due to increase of 3D audio system through multimedia device, an evaluation system is required for evaluating the 3D core algorithms for developing 3D audio system. Conventional evaluation systems have some problems. Researchers have to learn usage of evaluation system, in addition it is inefficient to use and search audio sources because audio sources are not indexed in general. To solve these problems, we design the architecture of 3D audio core algorithm evaluation database system enabling to automatically evaluate core algorithms using database management system. Also we define XML metadata scheme for information of saved audio source in database. This approach allows improving efficiency of search audio source and use of audio database.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.108-110
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• 2019

A Database is a collection of data that does not have redundancy, and it is essential to easily use and share information in an information society where the amount of information is increasing. A typical structure of a Database is a relational database and a tree-structure Database. This research studies the programming language MUMPS, which is a tree structure database. This language constructs the database by storing arrays in a dynamic or B-Tree format. Unlike SQL, which must be used in languages such as Java and C #, MUMPS supports language and database independently and can manage data, so the data porting rate is high. In fact, in U.S. hospitals, the MUMPS-based platform has a high market share.