• Title/Summary/Keyword: Multimedia Security

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A Study on the large scale Multimedia Security System (Large Scale Multimedia Security System 에 대한 연구)

  • 한희철;김동현;권중장
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2000.05a
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    • pp.320-324
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    • 2000
  • In this paper we propose and realize the large scale multimedia security system that one janitor control many rooms in many building on multimedia. We Study the system that one watch janitor lots of rooms and lots of buildings the same time, and store the trespasser's moving cource in Database for understanding his action pattern using computer vision technology, but the relational system cannot solve the problem that the trespasser disjoint the security system on sensing method and the system watch only one room or one building.

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A New Method for Robust and Secure Image Hash Improved FJLT

  • Xiu, Anna;Kim, Hyoung-Joong
    • 한국정보통신설비학회:학술대회논문집
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    • 2009.08a
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    • pp.143-146
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    • 2009
  • There are some image hash methods, in the paper four image hash methods have been compared: FJLT (Fast Johnson- Lindenstrauss Transform), SVD (Singular Value Decomposition), NMF (Non-Negative Matrix Factorization), FP (Feature Point). From the compared result, FJLT method can't be used in the online. the search time is very slow because of the KNN algorithm. So FJLT method has been improved in the paper.

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A Frequency Domain based Steganography using Image Frame and Collage (액자와 콜라주를 이용한 주파수영역 기반 스테가노그래피)

  • Yoon, Eun-Jun;Ahn, Hae-Soon;Bu, Ki-Dong;Yoo, Kee-Young
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.47 no.6
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    • pp.86-92
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    • 2010
  • This paper proposes a new steganography scheme based on frequency domain using various image frames and collages that can protect the copyright of digital contents for users and securely perform to exchange the security information in the digital communication environments. The main idea of our proposed scheme is that the security informations related its copyright embed into the frequency domain of the image frame and collages when a user decorates the original image by using various image frames and collages. The strengths of our proposed scheme are as follows: (1) It allows to freely control the quantity of embedded information by changing the number of image frames and collages. (2) It is secure to variety image distortion attacks. (3) It maintains high PSNR(Peak Signal to Noise Ratio). As a result, the proposed steganography scheme can be used practically diverse multimedia security fields such as digital copyright protect, secure message communication and digital watermarking.

Study on Security Framework using Security Quantitative Analysis for the Effective Multimedia Services to WLAN Mesh Network (무선랜 메쉬 네트워크에서의 효율적인 멀티미디어 서비스를 위한 보안 정량화 기반의 프레임워크 연구)

  • Shin, Myoung-Sub;Lim, Sun-Hee;Yi, Ok-Yeon;Lim, Jong-In
    • Journal of Broadcast Engineering
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    • v.13 no.2
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    • pp.261-273
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    • 2008
  • Multimedia service whose use is rapidly increasing supports effective services to convert and transmit multimedia data based on network speed, noise circumstance, terminal computation, and type of contents for satisfying QoS. For supporting information protection of multimedia service, it offers middle level of singular security service or security mechanism which is based on policy of service provider, depending on present terminal computation and type of contents. It can support security mechanism for more effective multimedia service, if we study security of application layer and network layer for supporting multimedia service. In this paper, we propose Multimedia security framework reflected on quantitative analysis of the WLAN(Wireless Local Area Network) mesh network security using the utility function in the level of the sorority, violation and addictive compensation model.

Integrity Authentication Algorithm of JPEG Compressed Images through Reversible Watermarking (가역 워터마킹 기술을 통한 JPEG 압축 영상의 무결성 인증 알고리즘)

  • Jo, Hyun-Wu;Yeo, Dong-Gyu;Lee, Hae-Yeoun
    • The KIPS Transactions:PartB
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    • v.19B no.2
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    • pp.83-92
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    • 2012
  • Multimedia contents can be copied and manipulated without quality degradation. Therefore, they are vulnerable to digital forgery and illegal distribution. In these days, with increasing the importance of multimedia security, various multimedia security techniques are studied. In this paper, we propose a content authentication algorithm based on reversible watermarking which supports JPEG compression commonly used for multimedia contents. After splitting image blocks, a specific authentication code for each block is extracted and embedded into the quantized coefficients on JPEG compression which are preserved against lossy processing. At a decoding process, the watermarked JPEG image is authenticated by extracting the embedded code and restored to have the original image quality. To evaluate the performance of the proposed algorithm, we analyzed image quality and compression ratio on various test images. The average PSNR value and compression ratio of the watermarked JPEG image were 33.13dB and 90.65%, respectively, whose difference with the standard JPEG compression were 2.44dB and 1.63%.

A Protection Protocol for License-based Digital Rights (라이선스 기반 디지털 저작권 보호 방안)

  • Shin Weon
    • The Journal of the Korea Contents Association
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    • v.5 no.6
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    • pp.368-377
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    • 2005
  • The Internet technologies allows anybody who has connect a network to access various multimedia information. But, it brings new issues about the violation of intellectual property and copyright of multimedia contents. Digital right managements have been actively studied as approaches to solve them. In this paper, we propose license-based schemes for the protection of contents and its rights on digital right management. The proposed schemes provide limited distribution and superdistribution of contents, and guarantee to securely use contents by usage rules.

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Attribute based User Authentication for Contents Distribution Environments

  • Yoo, Hye-Joung
    • International Journal of Contents
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    • v.8 no.3
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    • pp.79-82
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    • 2012
  • In digital contents distribution environments, a user authentication is an important security primitive to allow only authenticated user to use right services by checking the validity of membership. For example, in Internet Protocol Television (IPTV) environments, it is required to provide an access control according to the policy of content provider. Remote user authentication and key agreement scheme is used to validate the contents accessibility of a user. We propose a novel user authentication scheme using smart cards providing a secure access to multimedia contents service. Each user is authenticated using a subset of attributes which are issued in the registration phase without revealing individual's identity. Our scheme provides the anonymous authentication and the various permissions according to the combination of attributes which are assigned to each user. In spite of more functionality, the result of performance analysis shows that the computation and communication cost is very low. Using this scheme, the security of contents distribution environments in the client-server model can be significantly improved.

Video Watermarking Scheme on H.264/AVC using Selective Block Embedding (선택적 블록 삽입을 통한 H.264/AVC에서의 비디오 워터마킹 방법)

  • Kim, Jung-Min;Choi, Young-Soo;Kim, Hyoung-Joong
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.10 no.2
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    • pp.46-52
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    • 2011
  • This paper presents adaptive spread-spectrum watermarking scheme on the H.264/AVC video. The H.264/AVC has become popular video coding since it's compression performance has been improved greatly. That is why there is not enough space for embedding watermark using the spread-spectrum method. To overcome this problem, we propose selective block embedding scheme. The blocks which don't contain non-zero DCT (Discrete Cosine Transform) coefficients are selected by value. So we have enough space to embed watermarks. Experimental result shows that proposed scheme improves recovery rates of watermark about 12% and reduces distortion of watermarked video.

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Broken Integrity Detection of Video Files in Video Event Data Recorders

  • Lee, Choongin;Lee, Jehyun;Pyo, Youngbin;Lee, Heejo
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.10 no.8
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    • pp.3943-3957
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    • 2016
  • As digital evidence has a highly influential role in proving the innocence of suspects, methods for integrity verification of such digital evidence have become essential in the digital forensic field. Most surveillance camera systems are not equipped with proper built-in integrity protection functions. Because digital forgery techniques are becoming increasingly sophisticated, manually determining whether digital content has been falsified is becoming extremely difficult for investigators. Hence, systematic approaches to forensic integrity verification are essential for ascertaining truth or falsehood. We propose an integrity determination method that utilizes the structure of the video content in a Video Event Data Recorder (VEDR). The proposed method identifies the difference in frame index fields between a forged file and an original file. Experiments conducted using real VEDRs in the market and video files forged by a video editing tool demonstrate that the proposed integrity verification scheme can detect broken integrity in video content.

Embedding Binary Watermark Image using DWT Coefficients (이산 웨이블릿 변환계수를 이용한 이진 워터마크 영상)

  • Park, Kwang-Chae;Bae, Ceol-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.10
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    • pp.6317-6321
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    • 2014
  • Multimedia documents can be transferred quickly and easily across the Internet, and has attracted considerable interest in multimedia security and multimedia copyright protection. This paper proposes an animage watermarking scheme embedding a binary watermark image using Discrete Wavelet Transform (DWT) coefficients. The original image is transformed to the wavelet domain and decomposed in subbands. The binary watermark image, as a sequence of bits, is embedded into the middle frequency subbands. The original image is not needed to detect the watermark image. The proposed method detected fewer watermark bits but produced an approximately 10dB higher PSNR than the max/min method.