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SSO 기반 환경에서 클라우드 서비스를 제공하기 위한 접근제어 기술
장은겸 한국컴퓨터정보학회 2023 韓國컴퓨터情報學會論文誌 Vol.28 No.11
In this paper, a technology to protect important information from access in order to revitalize the cloud service market. A technology is proposed to solve the risk of leakage of important confidential and personal information stored in cloud systems, which is one of the various obstacles to the cloud service market. To protect important information, access control rights to cloud resources are granted to cloud service providers and general users. The system administrator has superuser authority to maintain and manage the system. Client computing services are managed by an external cloud service provider, and information is also stored in an external system. To protect important in-house information within the company, all users, it was designed to provide access authority with users including cloud service providers, only after they are authenticated. It is expected that the confidentiality of cloud computing resources and service reliability achieved through the proposed access control technology will contribute to revitalizing the cloud service market.
클라우드 컴퓨팅 환경에서의 다중 블록을 활용한 사용자 인증 기술
장은겸 한국컴퓨터정보학회 2020 韓國컴퓨터情報學會論文誌 Vol.25 No.11
Cloud computing technology provides economic and efficient system operation and management features to deal with rapidly changing IT technologies. However, this is less used in institutes and companies due to low security of cloud computing service. It is recognized that storing and managing important information, which is confidential in external systems is vulnerable to security threats. In order to enhance security of this cloud computing service, this paper suggests a system and user authentication reinforcement model. The suggested technology guarantees integrity of user authentication information and provides users with convenience by creating blocks for each cloud service and connecting service blocks with chains. The block chain user authentication model offers integrity assurance technology of block chains and system access convenience for SSO users. Even when a server providing cloud computing is invaded, this prevents chained invasions not to affect other systems. 클라우드 컴퓨팅 기술은 급변하는 IT 기술의 경제적이고 효율적인 시스템 운영 및 관리 기능을제공한다. 하지만, 기관 및 기업에서는 클라우드 컴퓨팅 서비스의 보안성 때문에 활용성이 떨어지고 있다. 외부 시스템에 대외비에 속하는 중요정보를 보관하여 관리하는 것은 보안에 취약하다고인식되어 있기 때문이다. 이러한 클라우드 컴퓨팅 서비스에 대한 보안성을 강화하기 위해 본 논문에서는 시스템 및 사용자 인증 강화 모델을 연구하였다. 제안 기술은 사용자 인증 정보를 클라우드 서비스별로 블록을 생성하여 서비스 블록을 체인으로 연결하여 정보의 무결성을 보증하고사용자에게는 편의성을 제공한다. 블록 체인 사용자 인증 모델은 블록 체인의 무결성 보증 기술과 SSO 사용자의 시스템 접근 편의성을 제공한다. 클라우드 컴퓨팅을 제공하는 서버에 침해가 발생하더라도 다른 시스템에 영향이 없도록 연쇄 침해를 방지한다.
A Study on Extraction and Comparison of Digital Content Key Frame in UCC Service Environment
장은겸 한국멀티미디어학회 2011 멀티미디어학회논문지 Vol.14 No.8
In this paper, we proposed a mechanism that prevents indiscreet use of digital contents, verifies created content’s copyrights to provide services to granted user and protects digital contents by law by authenticating the original digital content whenever an infringement of copyright occurs in UCC environments. The proposed mechanism uses specific information and features of contents as copyrights authentication information without additional information. Also, provides the fact of violation by inferring the modification of the original digital contents. That means this mechanism infers same or similar value from the contents; fraudulent use of content, modification of content color, modification of content format, modification of content resolution and illegal use of frame not principal key frame. In that point, we found that the inferred value from the content differed according to features of content modification.
장은겸,이범석 (사)디지털산업정보학회 2009 디지털산업정보학회논문지 Vol.5 No.2
The digital contents distribution system via network provides comfortability, usability, and diversified functions to content's users. However, for the characteristic of easy access of digital contents, the copyright infringements and indiscreet contents distribution are realized in this days. In other words, any users with the authentication key can access to copyright contents with any restrictions. To solve this problems, we proposed a user authentication mechanism which prevent indiscreet access to the digital content by using user system information. Also, to provide safe distribution of digital content, we used user's unique content authentication key.
네트워크 서비스 환경에서 MPEG-21을 활용한 디지털 콘텐츠 보호 및 컴퓨터 포렌식스 증거 관리 메커니즘
장은겸,이범석 (사)디지털산업정보학회 2010 디지털산업정보학회논문지 Vol.6 No.2
In network service environment, cultures from diversified fields are easily accessible thanks to the convenient digital content services. Unfortunately, unauthorized access and indiscreet misuse behaviors have deprived content owners of their copyrights. This study suggests an integrity-ensured model applicable for forensic evidence of digital content infringement in network service environment. The suggested model is based on MPEG-21core components for digital content protection and the system is designed in connection with the components of digital content forensics. Also, the present study suggests an efficient technology to protect and manage computer forensic evidence and digital content by authorizing digital content use and catching infringing logs of authorized users without lag in network environment for the benefit of network security and reliability.
블록체인 기술을 기반으로한 디지털콘텐츠 인증 및 관리 기술
장은겸(Eun-Gyeom Jang) 한국컴퓨터정보학회 2021 韓國컴퓨터情報學會論文誌 Vol.26 No.11
4차 산업혁명시대에 접어들면서 기존의 콘텐츠 제공 업체에만 의존했던 디지털콘텐츠 시장이 유투브와 같이 사용자의 참여로 다양한 디지털콘텐츠를 제공하고 있다. 이로 인해 디지털콘텐츠 시장의 활성화를 가져왔지만, 저작자의 저작권과 콘텐츠의 무분별한 도용 및 사용으로 디지털콘텐츠 시장에 악영향을 미치고 있다. 본 논문은 디지털콘텐츠를 보호하고 저작자의 저작권을 보호하기 위해 블록체인 기술을 기반으로 디지털콘텐츠 관리 기술을 연구하였다. 제안 기술은 디지털콘텐츠와 저작권자를 보호하고 사용자를 식별하여 무분별한 디지털콘텐츠 접근과 도용을 방지한다. 디지털콘텐츠의 안전한 관리를 위해 블록체인의 인증기술로 활용되는 해쉬 함수를 활용하여 사용자를 인증하고 디지털콘텐츠를 관리하여 무결성과 인증 서비스를 제공한다. After entering the 4th Industrial Revolution, the digital content market, which was only dependent on existing contents supply enterprises, is providing various digital content through the participation of users like YouTube. Accordingly, it activated the digital content market, but it causes a negative influence on the digital content market due to the copyright of the creator and the indiscriminate illegal use and usage of the content. This study researched digital content management technology based on blockchain technology to protect digital content and the copyright of the creator. The suggested technology protects the digital content and the copyright holder and discerns the users and prevents the indiscriminate approach and illegal use of digital content. For the safe management of digital content, hash function applied as the certification technology of blockchain is used to certify the users and manage the digital content and provide integrity and authentication service.