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Image data security transmission system with support of transparent transcoding

A technology for image data and secure transmission, applied in the field of image data security transmission systems, can solve the problems of difficult authentication methods, inability to guarantee the security of image content, and increasing the operational complexity of intermediate transcoding nodes.

Inactive Publication Date: 2013-11-27
INST OF SOFTWARE - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

This not only cannot guarantee the security of the image content, but also greatly increases the operational complexity of the intermediate transcoding node
In addition, in terms of image authentication, it is also a difficult problem to provide an authentication method that is robust to image compression and transcoding

Method used

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  • Image data security transmission system with support of transparent transcoding
  • Image data security transmission system with support of transparent transcoding
  • Image data security transmission system with support of transparent transcoding

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Embodiment Construction

[0051] Such as figure 1 As shown, the system of the present invention is deployed in the network, mainly including three types of network nodes: sending node (image data server), intermediate transcoding node and receiving node (including different types of terminal devices, such as desktop computers, mobile smart devices, etc.) . The entire image data security distribution system includes the following modules:

[0052] Computing perceptual hash module: used to execute image perceptual hash algorithm and generate perceptual hash value of image. Image perceptual hash algorithm is divided into three parts: preprocessing, feature extraction and postprocessing; this module takes the original image as input Data, perform perceptual feature extraction to obtain a perceptual hash value, and then input the perceptual hash value of the image to the code stream packaging module.

[0053] Compression coding module: used to execute image data compression algorithm and generate scalable...

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Abstract

The invention provides an image data security transmission system with the support of transparent transcoding. The system comprises three kinds of nodes which are a sending node, an intermediate transcoding node and a receiving node. The sending node is an image data server. The receiving node comprises different types of terminal devices. The sending node is provided with a calculation sensing Hash module of the sending node, a compression encoding module, a bit stream recomposition module, a hierarchical encryption module, and a bit stream package module. The intermediate node is provided with a safe transparent transcoding module. The receiving point is provided with a packet analysis module, a bit stream decoding module, an analysis bit stream module, a decompression encoding module and a computation perception Hash module of the receiving node. According to the system, a network intermediate node can directly carry out code rate conversion on a ciphertext domain bit stream, the decoding and decompression of the bit stream before the encoding of a converted bit stream is not needed, the end to end safety transmission of image data is realized, the safety transmission comprises the confidentiality, integrity and non-repudiation protection of an image, and the cost of transcoding is greatly reduced.

Description

technical field [0001] The invention relates to an image data secure transmission system supporting transparent transcoding, which belongs to the technical field of multimedia communication. Background technique [0002] With the rapid development of multimedia processing technology and computer network, multimedia communication applications such as IPTV, video conferencing and video monitoring have become increasingly popular. Due to the rapid improvement of network bandwidth performance, the improvement of compression formats and the emergence of some cutting-edge distribution technologies, such as Content Delivery Networks (Content Delivery Networks, CDN) and P2P systems, multimedia data distribution in heterogeneous networks has become increasingly Complete. As a kind of important multimedia data, digital image has gradually become an important carrier of people's information exchange, and has been widely used in economy, military affairs and daily life. However, some ...

Claims

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Application Information

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IPC IPC(8): H04L29/06
Inventor 马恒太易小伟郑昌文李明宇朱登科
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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