Method for encrypting video streaming information based on hyper-chaotic sequence

Abstract

The invention provides a method for encrypting MPEG (moving picture experts group) video streaming information based on a hyper-chaotic sequence, which is characterized in that a streaming encryption technology is combined with a block encryption technology so as to encrypt I frames and P frames of MPEG video streaming; in an algorithm, an initial value of a four-dimensional hyper-chaotic system is taken as an external secret key, the hyper-chaotic sequence generated by the four-dimensional hyper-chaotic system is utilized, and AC (alternating current) coefficients of video images are utilized to generate an inner secret key; and an XOR operation is carried out on DC (direct current) and AC coefficients of the I frames respectively, position scrambling is carried out on luminance information of the I frames by taking a 8*8 block as a unit, the XOR operation is carried out on motion vectors of F macro blocks in the P frames, and original video information is disturbed sufficiently. In the method, the space of the secret keys is huge, and the capacity to resist brute force attacks is strong; because an encryption process is embedded into an MPEG coding process, the method is good in instantaneity; and due to the introduction of the inner secrete key, the capacity of the encryption algorithm to resist plain text attacks is strengthened.

Description

【Technical field】 [0001] The invention belongs to the technical field of information security, and relates to a video stream information encryption method based on a hyperchaotic sequence. 【Background technique】 [0002] With the rapid development of Internet technology, video applications based on streaming media transmission have developed rapidly, which has brought great convenience to people's work and life. At the same time, many serious information security issues have emerged. Video data storage The ubiquity and ease of transmission and transmission make it vulnerable to damage and attack. Video streams such as digital TV, video mail, and videophone are vulnerable to man-made attacks in the network environment, such as information leakage, information theft, and unauthorized use of resources. It has become one of the urgent problems to be solved at present. [0003] In recent years, many image and video encryption algorithms have appeared, but many algorithms have d...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem that the existing encryption algorithm has mutual constraints on security and encryption speed, and cannot realize real-time performance, and provides a method for encrypting MPEG video streams based on hyperchaotic sequences, which ensures the real-time performance of the encryption algorithm At the same time, it has high safety performance

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