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Digital watermarking-based high-definition video encrypted transmitting method and system

A high-definition video and encrypted transmission technology, applied in the field of information security, can solve the problems of complex HDCP protocol level and high complexity, achieve high security, ensure content security, and take into account the effect of encryption efficiency

Inactive Publication Date: 2011-04-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, not all LCD monitors with DVI interface support the HDCP protocol, and must pass through a certified monitor with a corresponding hardware chip.
[0004] It can be seen that the level of HDCP protocol design is too complicated, and strict agreements must be followed for each link, which is too complicated

Method used

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  • Digital watermarking-based high-definition video encrypted transmitting method and system
  • Digital watermarking-based high-definition video encrypted transmitting method and system
  • Digital watermarking-based high-definition video encrypted transmitting method and system

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as figure 1 As shown, the system can be divided into six main modules, namely video encryption module 300, key encryption module 400, watermark embedding module 500, watermark extraction module 600, key decryption module 700, and video decryption module 800. figure 2 It is a flow chart of the high-definition video encryption transmission system provided by the present invention. The present invention provides encryption services for both ends that need to transmit high-definition video. The sending end verifies the legitimacy of all receivers and receives the RSA public key sent from the legal receiving end. The legitimate receiver uses the private key to decrypt the extracted watermark to obtain the video descrambling key, and then uses the video descrambling key to restore the original high-definition video stream.

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Abstract

The invention discloses a video watermarking-based high-definition video encrypted transmitting method. In the method, a random number generated by a random number generator is taken as a video scrambling key; the video scrambling key is encrypted by adopting an RSA algorithm to ensure that the video scrambling key cannot be captured in the transmitting process; and the encrypted video scrambling key is taken as a watermark to be embedded into the encrypted video by using a least significant bit (LSB) algorithm so as to realize secure encryption of the high definition video. The invention has higher security and lower computational complexity, and ensures the transmission quality of the high definition video content on the premise of secure transmission.

Description

technical field [0001] The invention belongs to information security technology, and in particular relates to a digital watermark-based high-definition video encryption transmission method. Background technique [0002] With the promotion and popularization of high-definition digital content such as digital TV and high-definition movies, digital audio and video playback and recording equipment have entered thousands of households, and illegal duplication and infringement of high-definition digital content will be very serious. TV programs, video resources on the Internet, and even large-screen terminal output devices can be seen. Because high-definition content is a digital signal, it is quite easy to copy and store, and there will be no distortion problems. Therefore, copyright management and protection of high-definition digital content has become an urgent problem to be solved. [0003] Existing content protection systems for high-definition video mainly include HDCP (h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/913H04N7/24
Inventor 凌贺飞邹复好李平江兴才王杨
Owner HUAZHONG UNIV OF SCI & TECH
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