Using Rubik’s Cube in Fragile Audio Watermark Encryption


Nowadays, due to the accelerated advancement of internet and multimedia technology, transmission and spreading of multimedia data have become very easy work. This has become a thoughtful threat to the owners of multimedia content. Therefore, a major attention has been given to multimedia data copyright security. In this paper, the proposal of an audio watermarking algorithm that is secure, robust, and blind for copyright security was presented. Decomposing the audio signal is made first with Discrete Wavelet Transform (DWT), thereafter selecting the coefficient of low-frequency which then made into frames. Next, on each frame, Discrete Cosine Transform (DCT) is directed. The essential features are concluded from the entered audio signal, then these features are encoded to produce Quick Response (QR) code to produce the watermark image, and by a novel technique which utilizes Rubik's cube, this watermark image is next encrypted. Later the watermark bits are implemented into DCT coefficient by Quantization Index Modulation )QIM( determined by frame number. The results of experiments imply that this algorithm is strong against numerous signal strikes, unnoticeable and has an elevated average Signal to Noise Ratio (SNR) value reaches 61 dB.