Method for realizing digital fingerprint encrypted video multicast transmission

Abstract

The invention discloses a method for realizing digital fingerprint encrypted video multicast transmission. The method comprises digital fingerprint encrypted transmission and digital fingerprint encrypted receiving. The digital fingerprint encrypted transmission comprises the following steps of: performing moving picture experts group-2 (MPEG-2) standard compression on carrier information source data of images and videos; processing image-based or video-based digital fingerprint data to finally form digital fingerprint data; deciding the energy magnitudes of digital fingerprint embedding and the relation of the energy magnitudes according to the probability of different branches of a tree structure to mutually generate collusion attack; processing by code division multiple access / time division multiple address (CDMA / TDMA) combined quadrature modulation to form blended data; enabling the blended data to form an encrypted data stream; and finally transmitting through a channel. The digital fingerprint encrypted receiving comprises the following steps of: deciphering and compressing according to a secret key K<m>, K<(i)>; recovering the information source data of the images and the videos; meanwhile, performing demodulation and processing on the information source data of the images and the videos, detecting the collusion attack generated among all levels of the tree structure by correlation functions to finally obtain the digital fingerprint data. The method for realizing the digital fingerprint encrypted video multicast transmission has the advantages that the safety is high; the communication cost is reduced; and meanwhile, the right and the validity of a system to track lawbreakers are enhanced.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to the technology of a method for realizing digital fingerprint encrypted video multicast transmission. Background technique [0002] Digital fingerprint video is the process of embedding fingerprint digital signals of different identifications into the video service signal given by the user, and the users are identified by using the bits with different meanings that appear. This kind of identification is also called fingerprint payload pay-load, which is usually realized through the process of robust digital watermark embedding. In digital rights management DRM text, the main purpose of fingerprint embedding and encryption is to protect video content from individual or collusive attacks. Among them, the collusion attack of digital video is the most important problem faced by its application. Therefore, the anti-collusion attack capability of digital video is an import...

AI Technical Summary

Problems solved by technology

[0005] (1) The disadvantages of orthogonal fingerprints are: it is more effective for fingerprint applications with few users, but as the number of users increases, the complexity of fingerprint detection and tracking algorithms increases significantly, and the energy of fingerprints decreases significantly in collusion. make the detector unable to detect the fingerprint

[0006] (2) The disadvantage of correlation fingerprints is that if correlation is introduced in the design, even if the copy of the digital content is attacked by collusion, the energy of the relevant part in the fingerprint will not be significantly reduced

[0007] (3) Wade Trappe et al. combined the theory of combinatorial design and block coding (such as BIBD, etc.) to propose an anti-collusion code ACC. The ability to collusion attacks, but greatly increases the use of transmission bandwidth requirements

Therefore, the system implementation cost is higher

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