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Feedback switching encryption method based on double-chaotic system

An encryption method and double chaotic technology are applied in the field of feedback switching encryption based on double chaotic systems, which can solve the problems of large amount of image data and high confidentiality, and achieve enhanced security, improved randomness of encrypted sequences, and improved unpredictability. Effect

Active Publication Date: 2019-07-12
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

[0003] Traditional text encryption technology is not suitable for video, which has a large amount of data and high real-time requirements. Therefore, video encryption technology based on hyperchaotic system has attracted extensive attention. The sequence generated by hyperchaotic system is highly sensitive to the initial value and has false Randomness, which is very consistent with the requirements of confidentiality, but the existing video encryption technology based on chaotic systems cannot meet the requirements for large data volume and high confidentiality of image data

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  • Feedback switching encryption method based on double-chaotic system
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[0046] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0047] The invention provides a feedback switching encryption method based on a dual chaotic system, which is used to improve the unpredictability of the switching signal and the randomness of the encryption sequence by using the dual chaotic system of the Lorenz system and the Qi system, and enhance the security of image data encryption . In the feedback switching encryption method based on the double chaotic system of the present invention, the switching signal is generated based on the Lorenz system, which changes the way of using fixed logic as the switching signal in the past, and increases the unpredictability of the switching signal; and then uses the encrypte...

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Abstract

The invention discloses a feedback switching encryption method based on a double-chaotic system, comprising the following steps of: discretizing a Qi hyper-chaotic system to obtain Qi state variablesrespectively corresponding to output channels after discretization of the Qi system; judging whether a switching signal needs to be generated or not according to a system state variable output by theLorenz system, and performing encryption operation on the Qi state variable and an original text bit stream corresponding to the image data to be encrypted to obtain a ciphertext generated after encryption; according to the generated ciphertext, adding a feedback switching link, and judging whether a switching signal needs to be generated or not according to a feedback result; the purpose of improving switching signal unpredictability and encryption sequence randomness by using a pair of double chaotic systems of a Lorenz system and a Qi system is achieved, and the security of image data encryption is enhanced.

Description

technical field [0001] The invention relates to the technical field of video encryption, in particular to a feedback switching encryption method based on a double chaotic system. Background technique [0002] With the development of network technology, especially the promotion of 5G technology, the use of video media to transmit information is becoming more and more widely used, such as video conferencing, entertainment video, real-time monitoring, etc. An important issue in video transmission is the confidentiality of image data. Image data without encryption is vulnerable to attack and theft, causing private information leakage and economic losses to video transmitters. Therefore, video encryption technology has become one of the video transmission technologies. important technology. [0003] Traditional text encryption technology is not suitable for video, which has a large amount of data and high real-time requirements. Therefore, video encryption technology based on hy...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2347H04L9/00
CPCH04L9/001H04N21/2347
Inventor 韩翰钟文琦杜沛峰王蕊孙辉
Owner CIVIL AVIATION UNIV OF CHINA
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