• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.1049-1052
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• 2005

DRM은 디지털콘텐츠의 지적재산권이 디지털 방식에 의해서 안전하게 보호. 유지되도록 하여 디지털콘텐츠의 창작에서부터 소비에까지 이르는 모든 유통 시점에서 거래규칙과 사용규칙이 지속적이고 적법하게 성취되도록 하는 기술이다. DRM은 디지털 형태로 유통되는 문서, 음악, 비디오, 게임, 소프트웨어, 이미지 등의 각종 디지털 콘텐츠를 불법 복제로부터 안전하게 보호하고, 콘텐츠 서비스의 유료화를 가능케 하는 기술 및 서비스를 말한다. 또한, 콘텐츠 자체와 보안과 저작권 보호뿐만 아니라 콘텐츠의 생성${\cdot}$유통${\cdot}$사용${\cdot}$관리에 필요한 모든 프로세스를 제어할 수 있게 해준다. 본 논문에서 구현된 기술은 암호알고리즘을 사용하여 함수의 위치 및 내용에 쉽게 접근할 수 없고 소프트웨어의 불법적인 분석 시도를 어렵게 하였다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.46 no.3
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• pp.50-56
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• 2009

Recently, according to the product variety of multimedia content some problems are occurred as like an illegal copying, an illegal distribution and a copyright infringement etc. So, for the solution of these problems, some methods were proposed as like watermarking which inserts the information of copyright to the content and the cipher for authentication to DRM which prevents an illegal copying using RSA. In this paper, the multimedia fingerprint based on BIBD code is inserted to the bit-plane of the image content for DRM with RSA, and while the decoding processing. The experiment is operated with the consideration of the image transmission and the transformation. As a result it confirmed that the multimedia fingerprint code inserted in image is detected 60% upper at AWGN 7dB and detected completely 100% at AWGN 10dB upper on PSNR 30, 40, 70 and 80 of Stirmark attacks.

• Journal of Digital Convergence
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• v.19 no.4
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• pp.133-139
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• 2021

Due to the rapid progress in network technology, many research on content security technologies is also being conducted in the mobile digital content sector. In the meantime, content protection has been immersed in preventing illegal copying, certifying, and issuance/management certificates, but still have many vulnerabilities in managing or authenticating confidential information. This study aims to strengthen confidential information about content based on dual management of content download rights through mobile phone numbers or device numbers. It also protect replay-attack by building a secure mobile DRM system where digital content is safely distributed based on a three-stage user authentication process. In addition, blockchain-based content security enhancements were studied during the primary/secondary process for user authentication for the prevention of piracy and copyright protection. In addition, the client authentication process was further improved through three final stages of authorization in the use of illegal content, considering that legitimate users redistributed their content to third-party.

• Journal of the Korea Society of Computer and Information
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• v.8 no.3
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• pp.1-8
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• 2003

The growth of Internet is the main factor that activates the Digital Contents Market. However the Digital Contents Market could be shrunk by an illegal reprinting and imprudent using. Therefore we urgently need a new technology which can prevent the contents from illegal using, illegal reprinting and imprudent using. We developed the system prohibits a imprudent using in order to activate the Digital Contents Market. We developed the system protects the contents safely by removing the dangerous for the illegal reprinting with providing the encoded contents and the system removes the contents according to the number of usage and the user authentication through Network.

• Journal of Internet Computing and Services
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• v.4 no.5
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• pp.21-29
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• 2003

Transferring the contents for multimedia shows recently very activity, So this fact ailows the contents for multimedia to be commercialized. These contents, however, included much vulnerability that it is difficult to be commercialized because attackers easily reproduce that. Many developers want to use watermarking method as the technique to protect the contents for multimedia, but it is very vulnerable to use only one method, This paper proposes the Secure DRM system which protects the contents for multimedia steganography methods. The DRM system is more powerful than general DRM systems in that it has the special feature of watermarking and steganography techniques, We can prevent the attackers from reproducing and stealing the contents illegally, and authenticating users through DRM systems.

• The Journal of Society for e-Business Studies
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• v.8 no.4
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• pp.167-181
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• 2003

The contents for multimedia are very activated along to revolution of Internet. So this fact allows the contents for multimedia to be commercialized. These contents , however, included much vulnerability that it is difficult to be commercialized because attackers easily reproduce that. Many developers want to use watermarking method as the technique to protect the contents for multimedia, but it is very vulnerable to use only one method. This paper proposes the Secure DRM system which protects the contents for multimedia using Public Key Infrastructure and steganography methods. The SDRM system is more powerful than general DRM systems in that it has the special feature of watermarking and steganography techniques. We can prevent the attackers from reproducing and stealing the contents illegally, and authenticating users through SDRM systems.

• Journal of Digital Contents Society
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• v.12 no.2
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• pp.165-176
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• 2011

Recently, digital rights management (DRM) related researches are widely spreading with prosperity of IT industries. The DRM technology protects proprietor of copyright by preventing mischanneling and illegal copy. In this paper, we propose a new DRM model that has an enhanced and efficient protocol based on certificate using smart card. The proposed model overcomes weaknesses of WCDRM model and has following additional advantages: first, copy protection is enhanced by hiding user's specific information from attacker by storing the information within smart card; second, server load for contents encryption is reduced by making clear protocols among author, distributer, certificate authority, and users; third, offline user authentication is guaranteed by combining partial secret values in media players and smart card. Exposure of core information also is minimized by storing them in smart card. In addition, we show that the proposed system is more secure than WCDRM model by comparing various factors of anonymous attackers.

• Journal of Internet Computing and Services
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• v.5 no.3
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• pp.1-9
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• 2004

The growth of Internet is the main factor that activates the Digital Contents Market and gives the convenience, efficiency and usefulness to the users. However the Digital Contents Market could be shrunk by an illegal reprinting and imprudent using. As a result, recently we can see that using the contents illegally through Internet makes the troubles between providers and customers and finally they are at law. Therefore we urgently need a new technology which can prevent the contents from illegal using, illegal reprinting and imprudent using, We developed the system prohibits a imprudent using in order to activate the Digital Contents Market, We developed the system protects the contents safely by removing the dangerous for the illegal reprinting with providing the encoded contents and the system removes the contents according to the number of usage and the user authentication through network.

• Journal of Digital Convergence
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• v.11 no.11
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• pp.675-682
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• 2013

This paper tries to solve the problems which previous methods have the model using smart card for protecting digital contents. This study provides a contents distribution model to protect the rights of author, distributor, and user as well as user's information by using technologies such as cryptography, DRM(Digital Right Management), access control, etc. The proposed system is evaluated as the most safety model compared with previous methods because it not only solves the problems which the previous methods have, but also protects four type of risks such as use of contents which other mobile devices download, the attack on the key to decode the message, the attack on leaking the contents, and the internal attack such as an illegal reproduction.

• Journal of Digital Convergence
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• v.10 no.6
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• pp.231-239
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• 2012

This paper tries to solve the problems which previous methods have such as the WCDRM(Watermark and Cryptography DRM) and the model using smart card for protecting digital contents. This study provides a contents distribution model to protect the rights of author, distributor, and user as well as user's information by using technologies such as cryptography, DRM(Digital Right Management), access control, etc. The proposed system is evaluated as the most safety model compared with previous methods because it not only solves the problems which the previous methods have, but also protects four type of risks such as use of contents which other mobile devices download, the attack on the key to decode the message, the attack on leaking the contents, and the internal attack such as an illegal reproduction.