Chaos and hyperchaos based two-level video streaming media encryption method

Abstract

The invention provides a chaos and hyperchaos based two-level video streaming media encryption method, which comprises the step of providing a chaos and hyperchaos based two-level video streaming media encryption algorithm. The method is combined with a video compression standard H.263 in network transmission; the first-level encryption is such that video streaming data is encrypted with a discrete cosine transform (DCT) based selective encryption algorithm in a video compression process; and the second-level encryption is performed after the video compression, and comprises the following two parts of: scrambling the video streaming data based on discrete Baker mapping, and confusing scrambled data based on hyperchaos mapping. As the multilevel encryption is adopted, and a hyperchaos system has a strong encryption performance, a video streaming media encryption system adopting the method can be used for effectively resisting malicious attacks and professional decryption; and moreover, the encryption method has a significant application value in the field of the safety of transmission information of network streaming media.

Description

【Technical field】: [0001] The invention belongs to the fields of information security technology and network communication technology, relates to an algorithm for encrypting video streaming media transmitted in real time in a network, and provides a safe and effective encryption solution for safe and confidential transmission of network video information and protection of related intellectual property rights. 【Background technique】: [0002] Today's society is a highly informationized society, and information security issues are becoming more and more important to the national economy, social development and people's lives. In information security issues, the security technology of network multimedia occupies a very important position. With the rapid development and wide application of computer technology, network technology and multimedia technology, it provides great convenience for people to obtain and exchange information, and also contains huge commercial benefits. How...

AI Technical Summary

Problems solved by technology

After processing the video stream information, some important parts of the information are selected for encryption. Although the real-time performance is guaranteed, this kind of selective encryption algorithm has many defects from the perspective of security, and is easy to be attacked and deciphered.

[0007] (3) The design of chaotic encryption algorithm is mostly based on simple chaotic system, and simple chaotic system is easier to be deciphered by mature nonlinear data processing technology

The usual selective encryption algorithm only encrypts part of the information, and the defense measures are relatively weak, which is not enough to resist the attacks of malicious attackers. Therefore, it is necessary to establish multiple levels of encryption measures

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