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

An information encryption and hyperchaotic technology, applied in the field of information security, can solve the problems of mutual restriction between encryption algorithm security and encryption speed, and inability to achieve real-time performance

Inactive Publication Date: 2011-09-07
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

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Embodiment 1

[0042] The following example to achieve

[0043]1, MPEG video stream I frame image is divided into 8 * 8 tiles, use formula (1) to carry out discrete cosine transform to each tile, obtain AC, DC coefficient after quantization;

[0044] 2. Take the initial value x of the hyper-chaotic system 1 (0)=x 2 (0)=x 3 (0)=x 4 (0)=0.1 as the external key, use the fourth-order Runge-Kutta method to iterate the hyperchaotic system for 200000 times, and obtain the hyperchaotic sequence x 1 , x 2 , x 3 , x 4 , use formula (3) to carry out numerical processing on the hyperchaotic sequence, and obtain x′ 1 , x′ 2 , x′ 3 , x′ 4 ; Calculate the m value according to formula (4), select the combination of chaotic sequences;

[0045] 3. The k calculated according to the formula (6) is used as the internal key to change the initial value of the hyper-chaotic system to obtain a new hyper-chaotic sequence

[0046] 4. Use x' 1 , x′ 2 , x′ 3 , x′ 4 The sequence performs XOR operation o...

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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...

Claims

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Application Information

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IPC IPC(8): H04N21/2347H04N7/30H04L9/00H04N19/467
Inventor 董恩增陈在平李海芬李程程
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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