Video file protection method
A technology for video files and files, applied in the field of information security, can solve the problems of high development cost, illegal editing and tampering, and less watermark content, and achieve the effect of reducing development cost and not easy illegal editing and tampering.
Active Publication Date: 2019-04-09
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology
[0004] The present invention provides a method for protecting video files in order to solve the problems that the existing video watermarking technology has high development costs, less watermark content that can be embedded, and is easy to be illegally edited and tampered with
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[0037] The technical scheme of the present invention is illustrated in detail below.
[0038] The video file protection method in this example first bitifies the watermark information to be embedded in the original video file to obtain the watermark plaintext bit stream, assuming that the watermark plaintext bit stream obtained in this example has 64 bits, and the watermark plaintext bit stream is expressed as W={w00w01 w02 w03 w04 w05 w06 w07 w08...w61 w62 w63}.
[0039] Then perform 8-in-8-out Sbox transformation on the watermark plaintext bit stream, the S box is as follows figure 1 As shown, the watermark plaintext bit stream is divided into 8-bit groups, which are used as the input of the S box. After the S confusion transformation, the 8-bit watermark S-transformed ciphertext is output. For example, the selected first group of 8-bit watermark plaintext is {w00 w01 w02 w03 w04 w05 w06 w07}, divide it into two sets of input variables x1 and x2, x1={w00 w01 w02 w03}, x2={w...
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The invention relates to the technical field of information security, and solves the problems that the existing video watermarking technology is high in cost, relatively few in watermark content and easy to illegally edit and tamper. According to the technical scheme, the method comprises the steps of carrying out bit processing on watermark information to be embedded into an original video file,obtaining a watermark plaintext bit stream, conducting password transformation on the watermark plaintext bit stream, and obtaining a watermark ciphertext bit stream; combining the watermark ciphertext bit stream with the key information of the original video file, and carrying out cryptographic hash operation to obtain a hash value; and analyzing and stripping the original video file, finding outa box component, of which the number of bytes of any redundancy bit in the original video file is greater than or equal to the sum of the number of bytes of the watermark ciphertext bit stream and the number of bytes of the hash value, and storing the watermark ciphertext bit stream and the hash value in the redundancy bit of the box component to form a new video file. The method disclosed by theinvention is low in cost, more watermark contents can be embedded, and the video file is not easily illegally edited and tampered. The method is particularly suitable for video files in MP4 formats.
Description
technical field [0001] The invention relates to the technical field of information security, in particular to the information security technology of video files. Background technique [0002] The research and development of video watermarking technology is to protect the copyright of digital film and television works. In addition to the general simple attack, detection failure attack, confusion attack and watermark removal attack on video watermarking, since the carrier of video watermarking is the video frame played continuously Composition, video watermarking may also suffer from frame averaging, frame discarding, frame swapping and other attacks specifically for video watermarking. [0003] At present, the implementation schemes of video watermarking can be divided into three types: one is to embed the watermark in the original video, that is, the watermark is embedded in the original code stream, and the original video code stream with watermark information is generated,...
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IPC IPC(8): H04N19/467H04N5/913
CPCH04N5/913H04N2005/91335H04N19/467
Inventor 康红娟袁杨邓密密
Owner SICHUAN CHANGHONG ELECTRIC CO LTD