1 results about "Geometric transformation" patented technology

The invention discloses a content copyright protection method based on original video data transformation encryption, and the method specifically comprises the steps: carrying out the encryption of geometric structure transformation of original video data contained in a to-be-played file, and generating geometric transformation encryption algorithm description information embedded in the to-be-played file; obtaining a playing address which is sent by a user and corresponds to the to-be-played file; performing validity verification on a player called by the client through a DRM plug-in, and driving the DRM plug-in to obtain a to-be-played file corresponding to the playing address when the verification is passed; and based on the geometric transformation encryption algorithm description information carried by the to-be-played file, performing geometric structure restoration decryption on the to-be-played file through a geometric transformation decryption plug-in carried by the client, and playing the decrypted to-be-played file on the called player. According to the embodiment of the invention, the original video stream of the to-be-played file is subjected to encryption and decryption processing of geometric structure transformation, so that the security of video file propagation is improved.