Video Chaos Encryption Method and System
A chaotic encryption and video technology, which is applied in the field of wireless communication encryption and information security, can solve the problems of not being able to balance confidentiality, complexity, and real-time performance, and achieve the effect of reducing computational complexity and ensuring security issues
Active Publication Date: 2018-06-05
GUANGDONG PLANNING & DESIGNING INST OF TELECOMM
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Problems solved by technology
[0004] Based on this, it is necessary to provide a video chaotic encryption method and system for the existing technology that cannot balance confidentiality, complexity, and real-time performance
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[0022] Embodiments of the video chaos encryption method of the present invention will be described below in conjunction with the accompanying drawings.
[0023] figure 1 It is a flowchart of a video chaos encryption method of an embodiment. Such as figure 1 Shown, video chaos encryption method of the present invention may comprise the following steps:
[0024] S1, establish a three-dimensional coordinate system of plane position and time, divide the video stream to be transmitted according to the time coordinate axis in the three-dimensional coordinate system, and obtain several video streams;
[0025] In one embodiment, in step S1, a three-dimensional coordinate system of plane position and time can be established, wherein the X-axis and Y-axis of the three-dimensional coordinate system are used as the plane position coordinate axes of the video stream to be transmitted, and the Z-axis is the time coordinate axis. The video stream to be transmitted can be divided into S a...
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The invention relates to a method and a system for chaotic encryption of a video. The method comprises the following steps of establishing a three-dimensional coordinate system of a plane position and time, and dividing a to-be-transmitted video stream according to a time coordinate axis in the three-dimensional coordinate system in order to obtain sections of video streams; carrying out time coordinate transformation on the video streams section by section to obtain a first coordinate point of a video frame of each section of video stream at the time coordinate axis in a unit ball; computing coordinates of an intersection point of a trajectory of a phase space of STF (Stretch-Twist-Fold) chaotic mapping and a first plane, wherein the first plane is a plane which passes through the first coordinate point and is vertical to the time coordinate axis; and adopting plane cat mapping to carry out chaotic encryption on the video frames of the video streams according to the coordinates of the intersection point. According to the method and the system for chaotic encryption of the video, three-dimensional STF mapping and two-dimensional plane cat mapping are combined, so that the security problem is guaranteed and the computational complexity is reduced.
Description
technical field [0001] The invention relates to the technical field of wireless communication encryption and information security, in particular to a video chaos encryption method and system. Background technique [0002] With the continuous development of broadband network and digital compression technology and the update of wireless communication, network communication and chip technology, the rapid development of multimedia services, such as video conferencing, video telephony and video on demand, etc. have gradually become ATM (Asynchronous Transfer Mode, asynchronous transfer mode) The main business of the network. Therefore, the security and confidentiality of these services are increasingly important, effectively resisting hackers or thieves' attacks, and ensuring the interests of users and manufacturers have become the key to the development of multimedia services. Video data is the most important data in the multimedia business. It is composed of images. On the one...
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IPC IPC(8): H04N21/2347H04N21/845
CPCH04N21/23473H04N21/8456
Inventor 李炯城肖恒辉张欣欣管学锋
Owner GUANGDONG PLANNING & DESIGNING INST OF TELECOMM