• Proceedings of the Korea Society for Industrial Systems Conference
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• 2006.05a
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• pp.205-210
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• 2006

본 논문에서는 간섭계와 직렬 위상 카드를 이용한 광 보안 시스템을 제안하였다. 먼저 원영상을 암호화하기 위해 원영상을 암호화하는 것이 아니라 원영상에 대한 이진 위상 컴퓨터형성홀로그램을 반복 알고리즘을 이용하여 구하고, 이진 위상 컴퓨터형성홀로그램과 무작위 생성된 위상 키 영상과의 XOR 연산을 통해 암호화된 영상을 구한다. 홀로그램의 복호화 과정은 암호화된 영상과 암호화시에 사용된 무작위 위상 영상 키를 직렬 정합시킨 후, 기준파와의 간섭에 의해 수행된다. 이때, 간섭패턴은 주위 환경에 상당히 민감하다. 그래서 광굴절매질의 자기위상공액성질을 이용하여 안정된 간섭패턴을 얻는다. 그리고 원영상은 복원된 홀로그램을 위상 변조한 후, 역푸리에 변환하여 최종적으로 구한다. 제안된 시스템에서는 암호화시에 사용된 무작위 키 영상 정보가 없으면 전혀 복원이 되지 않고, 키 영상을 달리함에 따라 복원되는 홀로그램의 패턴을 달리할 수 있으므로 차별화된 인증 시스템에 활용할 수 있다. 그리고 홀로그램의 성질에 의해 암호화된 영상이 일부 절단되더라도 원래의 영상을 복원할 수 있다.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.231-236
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• 2003

Video conferencing system it is various at internet and uses the reading is become accomplished. Research of like this portion synchronization of audio, the video compression technique and multimedia data, supports the video conference the research of the Mbone of the If multicast for being active, being become accomplished the multimedia service which is various an video from internet, the line speed of communication becomes high-speed anger and to follow leads is become accomplished. The video conference from opening elder brother dispersion internet network environment the problem against the image which is an image conference data and a voice security is serious and it raises its head. To sleep it presents the security method which from the video conference it follows in quality of multimedia data from the dissertation which it sees and it does.

• Journal of the Korea Society of Computer and Information
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• v.10 no.4 s.36
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• pp.143-148
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• 2005

Video conference system it is various at internet and uses the reading is become accomplished. Research of like this portion synchronization of audio, the compression technique and multimedia data, supports the video conference the research of the Mbone of the IP multicast for being active. being become accomplished the multimedia service which is various an video from internet, the line speed of communication becomes high-speed anger and to follow leads is become accomplished. The video conference from opening elder brother dispersion internet network environment the problem against the image which is an image conference data and a voice security is serious and it raises its head. To sleep it presents the security method which from the video conference it follows in quality of multimedia data from the dissertation which it sees and it does.

• The Journal of Korean Institute of Information Technology
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• v.17 no.10
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• pp.101-113
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• 2019

Recently, the intelligent video surveillance technology has become able to provide various services such as predictive surveillance that have not been provided previously. Securing the security of the intelligent video surveillance is essential, and malicious manipulation of the original CCTV video data can lead to serious social problems. Therefore, in this paper, we proposed an intelligent video surveillance environment based on blockchain. The proposed scheme guarantees the integrity of the CCTV image data and protects the ROI privacy through the edge blockchain, so there is no privacy exposure of the object. In addition, it is effective because it is possible to increase the transmission efficiency and reduce storage by enabling video deduplication.

• Journal of Internet Computing and Services
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• v.12 no.2
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• pp.123-133
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• 2011

This paper introduces security problems on the video surveillance systems where the network cameras are equipped at remote places and isolated from the updated and secure environment and proposes a framework for a proxy server that is delegated to connect to network cameras by providing a secure connections from the clients. The server in the framework is deployed within a secure network, secretes the information for connection to cameras and authenticates the clients. Additionally, it provides a secure video service incorporating multi-level privileges for both images and clients through a encryption key distribution and management facility. Through an implementation of the server and a its deployment, it was proved that In this server implement to multi network camera and we confirm compare direct access to network camera equal video quality of service and it can be protection network camera. We expect that can be secure and integral management about traditional network camera through experimental result.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1554-1557
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• 2013

기존 아날로그 방식의 CCTV는 화질이 좋지 않고, 장시간 사용할 경우 화질이 나빠지는 문제가 발생한다. 이와 같은 문제를 해결하기 위해 아날로그 신호출력을 디지털 방식으로 변환하는 DVR과 IP 네트워크로부터 디지털 신호를 받아 처리하는 NVR이 등장하게 되었다. 이와 같은 영상 보안 이슈가 등장함에도 불구하고 보안 산업 보수성과 새로운 기술을 받아들이는데 있어서의 제약사항 등의 이유로 IP-Suveillance에 대한 이해가 부족한 실정이다. 따라서 본 논문에서는 영상보안 시스템의 동향과 분석을 위해 DVR과 NVR을 투자측면, 비용측면, 유지측면에서 비교 분석하였다.

• Journal of Korea Technology Innovation Society
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• v.20 no.3
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• pp.781-804
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• 2017

Video surveillance industry as a high-tech industry has traits that a pace of source technology development is slow while a pace of application technology development is fast. Unlike domestic companies have shown technological excellence in the field of video surveillance hardware, global leading companies are leading technologies in the field of intelligence video surveillance which would lead the future of the industry. Therefore, technology selection of the domestic companies determines the viability of the company with respect to the terms of market competitiveness reinforcement. In order to achieving this, find out the technology areas where the global leading companies are focused on analysis of global patents. After global patents analysis, identify the status of domestic technologies and analyze the difference between the global leading companies and the domestic companies. Decompose the technologies by element technology-application matrix which is obtained through a panel discussion of domestic SMEs' CTO, CEO, or other experts, they derive the necessary R&D opportunity technologies to ensure the future competitiveness of the company.

• Journal of Korea Multimedia Society
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• v.10 no.11
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• pp.1417-1426
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• 2007

As one of schemes to protect multimedia content. it is the selective encryption scheme to encrypt partially multimedia content. Compared AES(advanced encryption standard) of traditional encryption, the selective encryption scheme provides low security but is applicable to applications of multimedia content not to require high secrecy. In this paper, we improve the image scrambling scheme proposed by Van De Ville which scrambles an image without bandwidth expansion using DPSS(discrete prolate spheroidal sequence) to make it more secure based on Shujun's research which verifies the secrecy of Van De Ville's scheme. The proposed method utilizes an orthonormalized random matrix instead of Hadamard matrix for secret matrix and to add it for providing high secrecy against statistical attack or known-plaintext attack using some statistical property or estimate of secret matrix from a scrambled image. The experimental results show that the proposed method is more secure than the existing scheme. In addition, we show that the proposed method can be applied to access control or copy control of watermarking application.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.1100-1103
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• 2007

보안관제시스템이 사이버 공격 현황을 보다 한눈에 알 수 있도록 시각적이고 입체적으로 바뀌고 있다. 네트워크 이상트래픽과 보안이벤트를 단순 텍스트나 표, 그래프를 넘어 3차원 영상 화면에서 직관적으로 분석하고 공격 상황을 볼 수 있는 기술이 보안관제시스템에 속속 결합되고 있어 주목된다. 본 연구는 기존 보안시스템 화상의 저장방법, 화상의 감시, 녹화된 화상의 검색 시 불안정성, 운영방법, 설치 방법 등을 혁신적으로 보완한 NETWORK CAMERA 은 RTOS, 카메라, 영상압축기, LAN제어기 등을 하나로 통합한 Embedded System으로 구성되어 운영자뿐만 아니라 누구든지 손쉽게 운영할 수 있도록 초점을 맞추어 인터넷 웹 환경에서 제공토록 개발되어 운영의 효율성을 높인 차세대 보안시스템을 구축하고자 합니다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11a
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• pp.771-774
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• 2002

인터넷 시대에 접어들면서 웹 카메라를 이용한 보안 시스템의 개발이 활발하다. 원격지에 설치된 카메라가 보내준 영상을 통하여 현재의 상황을 파악할 수 있으며, 적절한 조치를 웹을 통해 취할 수 있다. 실시간 영상전송에 따른 저장 방식에 있어서 움직임이 검출되었을 때에만 영상을 저장하는 방식을 선호하고 있다. 따라서 본 논문에서는 카메라로부터 입력되어지는 입력영상과 배경영상의 차를 이용하여 움직임 검출하는 방법을 제안한다. 카메라에서 받아오는 영상을 배경영상과 입력영상으로 구분 한 다음 두 영상의 차를 구하여 영상의 변화점을 찾는다. 이미지 픽셀 검사는 모든 픽셀을 연산에 참석하는 방식을 탈피하여 일정한 간격을 두고 이미지의 픽셀을 검색하여 움직임 검출을 한다.