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Video encryption algorithm based on new spatiotemporal chaos system

A space-time chaos and encryption algorithm technology, applied in the field of H.264 video encryption algorithm, can solve the problems of insufficient encryption security requirements, inapplicability, and slow encryption speed

Active Publication Date: 2014-10-08
HARBIN INST OF TECH AT WEIHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Algorithms with high real-time performance have relatively low security, which is not enough to meet the security requirements of encryption; algorithms with high security have slow encryption speed, which has a great impact on the compression ratio of video data, and are also not suitable for practical applications.

Method used

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  • Video encryption algorithm based on new spatiotemporal chaos system
  • Video encryption algorithm based on new spatiotemporal chaos system
  • Video encryption algorithm based on new spatiotemporal chaos system

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Embodiment Construction

[0151] In order to better understand the technical solutions of the present invention, the implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0152]The first step is to set up a video encryption environment based on H.264, and implement the present invention in a codec related to H.264, set up a coding encryption and decryption environment, and complete as follows figure 1 Among them, the preliminary preparation for H.264 encoding, compression and encryption;

[0153] The second step, such as figure 1 As shown in , respectively input the user's initial key for selecting the encryption control module and the spatiotemporal chaos encryption module, and send it to the corresponding key generator to complete the initial setting of the encryption system and prepare the original video stream to be encoded and encrypted. Such as mobile.yuv, ready to start the encoding and encryption process;

[0154] ...

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Abstract

The invention relates to an H.264 video encryption algorithm based on a spatiotemporal chaos system and belongs to the technical field of multimedia information security. The H.264 video encryption algorithm is provided to solve the problem that the requirements for real time performance, high security and low complexity cannot be met easily by an existing H.264 video encryption algorithm. A compound chaos cryptographic algorithm is constructed by designing a complex spatiotemporal chaos system model, and a more secure encryption pseudorandom sequence hard to crack is designed and generated. Meanwhile, by selecting an encryption control technology, intra-frame and inter-frame prediction modes, the residual data scanning sequence before coding of a CAVLC coding process and multiple key data in coding are encrypted. Theoretical analysis and experimental results show that the algorithm is high in encryption speed and security and small in influence on the compression ratio, the video format is kept being free of damage, and the algorithm has extensive application prospects and practical value.

Description

technical field [0001] The invention belongs to the technical field of multimedia information security, and in particular relates to an H.264 video encryption algorithm based on a space-time chaotic system. Background technique [0002] With the continuous development and innovation of computer network technology and wireless mobile communication technology, digital media data (including images, sounds, videos, etc.) Become more diversified, such as video conferencing, video on demand, video real-time monitoring systems and other related fields. Similar to other network transmission data, if video data is transmitted in an open network without encryption, it will be easily attacked by people, such as data interception, information theft, data tampering, data addition and deletion, etc. The security of video data is crucial to the application of multimedia, and it has become an obstacle to the development of video technology. Therefore, how to fully ensure the convenience ...

Claims

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Application Information

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IPC IPC(8): H04N19/46H04N19/61H04N19/13
Inventor 佟晓筠李凌昊王翥张淼刘杨
Owner HARBIN INST OF TECH AT WEIHAI
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