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Symmetric watermarking in network security refers to a method of embedding information into digital data such as images, audio, video, or documents in a way that the same secret key is used for both embedding the watermark and later extracting or verifying it. This approach is based on the principles of symmetric cryptography where one shared key is applied for both encryption and decryption. In watermarking, the embedded information is hidden in such a way that it is imperceptible to human senses, __________ _____ ________ _________ ________ ___ ___ ___ _____ _______.
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